Subtract 12/20 from 7/63
7/63 - 12/20 is -22/45.
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,
12/20 = 12 × 63/20 × 63 = 756/1260 - Subtract the two like fractions:
140/1260 - 756/1260 = 140 - 756/1260 = -616/1260 - After reducing the fraction, the answer is -22/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/63-12/20 7/63-24/20 7/63-12/40 21/63-12/20 7/63-36/20 7/63-12/60 35/63-12/20 7/63-60/20 49/63-12/20 7/63-84/20