Subtract 80/63 from 21/60
1st number: 21/60, 2nd number: 1 17/63
21/60 - 80/63 is -1159/1260.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 63 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 60 × 21 = 1260,
21/60 = 21 × 21/60 × 21 = 441/1260 - Likewise, for the 2nd fraction, since 63 × 20 = 1260,
80/63 = 80 × 20/63 × 20 = 1600/1260 - Subtract the two like fractions:
441/1260 - 1600/1260 = 441 - 1600/1260 = -1159/1260
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/60-80/63 63/60-80/63