diff --git a/build.gradle b/build.gradle
old mode 100755
new mode 100644
index cd5a65d..1a408bc
--- a/build.gradle
+++ b/build.gradle
@@ -11,7 +11,6 @@ repositories {
 }
 
 dependencies {
-    compile group: 'org.apache.commons', name: 'commons-math3', version: '3.6.1'
     compile 'com.moandjiezana.toml:toml4j:0.7.1'
     compile "org.jetbrains.kotlin:kotlin-stdlib-jre8"
     testCompile 'junit:junit:4.12'
diff --git a/src/main/java/org/nwapw/abacus/number/PreciseNumber.java b/src/main/java/org/nwapw/abacus/number/PreciseNumber.java
index 2d515fc..094e5a9 100755
--- a/src/main/java/org/nwapw/abacus/number/PreciseNumber.java
+++ b/src/main/java/org/nwapw/abacus/number/PreciseNumber.java
@@ -1,7 +1,6 @@
 package org.nwapw.abacus.number;
 
 import java.math.BigDecimal;
-import java.math.BigInteger;
 import java.math.MathContext;
 
 /**
@@ -62,15 +61,6 @@ public class PreciseNumber extends NumberInterface {
         this.value = value;
     }
 
-    /**
-     * Constructs a precise number from the given BigInteger.
-     *
-     * @param value a BigInteger object representing the value of the number.
-     */
-    public PreciseNumber(BigInteger value) {
-        this.value = new BigDecimal(value);
-    }
-
     @Override
     public int getMaxPrecision() {
         return internalContext.getPrecision();
diff --git a/src/main/java/org/nwapw/abacus/number/RationalNumber.java b/src/main/java/org/nwapw/abacus/number/RationalNumber.java
deleted file mode 100755
index 62653e6..0000000
--- a/src/main/java/org/nwapw/abacus/number/RationalNumber.java
+++ /dev/null
@@ -1,115 +0,0 @@
-package org.nwapw.abacus.number;
-
-import org.apache.commons.math3.fraction.BigFraction;
-import org.apache.commons.math3.fraction.Fraction;
-
-import java.math.BigInteger;
-
-public class RationalNumber extends NumberInterface{
-
-    static final RationalNumber ONE = new RationalNumber(BigFraction.ONE);
-
-    /**
-     * The value of the number.
-     */
-    private BigFraction value;
-
-    /**
-     * Constructs a new instance with the given value.
-     * @param value
-     */
-    public RationalNumber(BigFraction value){
-        this.value = value;
-    }
-
-    @Override
-    public int getMaxPrecision() {
-        return 0;
-    }
-
-    @Override
-    protected NumberInterface multiplyInternal(NumberInterface multiplier) {
-        return new RationalNumber(value.multiply(((RationalNumber)multiplier).value));
-    }
-
-    @Override
-    protected NumberInterface divideInternal(NumberInterface divisor) {
-        return new RationalNumber(value.divide(((RationalNumber)divisor).value));
-    }
-
-    @Override
-    protected NumberInterface addInternal(NumberInterface summand) {
-        return new RationalNumber(value.add(((RationalNumber)summand).value));
-    }
-
-    @Override
-    protected NumberInterface subtractInternal(NumberInterface subtrahend) {
-        return new RationalNumber(value.subtract(((RationalNumber)subtrahend).value));
-    }
-
-    @Override
-    protected NumberInterface negateInternal() {
-        return new RationalNumber(value.negate());
-    }
-
-    @Override
-    protected NumberInterface intPowInternal(int exponent) {
-        return new RationalNumber(value.pow(exponent));
-    }
-
-    @Override
-    public int compareTo(NumberInterface number) {
-        return value.compareTo(((RationalNumber)number).value);
-    }
-
-    @Override
-    public int signum() {
-        return value.getNumerator().signum();
-    }
-
-    @Override
-    protected NumberInterface ceilingInternal() {
-        if(value.getNumeratorAsInt() != 1){
-            return floorInternal().add(ONE);
-        }
-        return this;
-    }
-
-    @Override
-    protected NumberInterface floorInternal() {
-        BigInteger floor = value.bigDecimalValue().toBigInteger();
-        if(value.compareTo(BigFraction.ZERO) < 0 && value.getDenominatorAsInt() != 1){
-            floor = floor.subtract(BigInteger.ONE);
-        }
-        return new RationalNumber(new BigFraction(floor));
-    }
-
-    @Override
-    protected NumberInterface fractionalPartInternal() {
-        return this.subtractInternal(floorInternal());
-    }
-
-    @Override
-    public int intValue() {
-        return 0;
-    }
-
-    @Override
-    protected NumberInterface promoteToInternal(Class<? extends NumberInterface> toClass) {
-        return null;
-    }
-
-    @Override
-    public NumberInterface getMaxError() {
-        return toPreciseNumber().getMaxError();
-    }
-
-    @Override
-    public String toString(){
-        return toPreciseNumber().toString();
-    }
-
-    PreciseNumber toPreciseNumber(){
-        return (PreciseNumber) new PreciseNumber(value.getNumerator()).divideInternal(new PreciseNumber(value.getDenominator()));
-    }
-}