Subtract 20/36 from 4/63
4/63 - 20/36 is -31/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 36 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 63 × 4 = 252,
4/63 = 4 × 4/63 × 4 = 16/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
20/36 = 20 × 7/36 × 7 = 140/252 - Subtract the two like fractions:
16/252 - 140/252 = 16 - 140/252 = -124/252 - After reducing the fraction, the answer is -31/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/63-20/36 4/63-40/36 4/63-20/72 12/63-20/36 4/63-60/36 20/63-20/36 28/63-20/36