Subtract 42/20 from 7/63
1st number: 7/63, 2nd number: 2 2/20
7/63 - 42/20 is -179/90.
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,
42/20 = 42 × 63/20 × 63 = 2646/1260 - Subtract the two like fractions:
140/1260 - 2646/1260 = 140 - 2646/1260 = -2506/1260 - After reducing the fraction, the answer is -179/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/63-42/20 7/63-84/20 7/63-42/40 21/63-42/20 7/63-42/60 35/63-42/20 49/63-42/20