Subtract 4/20 from 7/63
7/63 - 4/20 is -4/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 20 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 63 × 20 = 1260,
7/63 = 7 × 20/63 × 20 = 140/1260 - Likewise, for the 2nd fraction, since 20 × 63 = 1260,
4/20 = 4 × 63/20 × 63 = 252/1260 - Subtract the two like fractions:
140/1260 - 252/1260 = 140 - 252/1260 = -112/1260 - After reducing the fraction, the answer is -4/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/63-4/20 7/63-8/20 7/63-4/40 21/63-4/20 7/63-12/20 7/63-4/60 35/63-4/20 49/63-4/20 7/63-28/20