Subtract 21/20 from 16/63
1st number: 16/63, 2nd number: 1 1/20
16/63 - 21/20 is -1003/1260.
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,
16/63 = 16 × 20/63 × 20 = 320/1260 - Likewise, for the 2nd fraction, since 20 × 63 = 1260,
21/20 = 21 × 63/20 × 63 = 1323/1260 - Subtract the two like fractions:
320/1260 - 1323/1260 = 320 - 1323/1260 = -1003/1260
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/63-21/20 16/63-42/20 16/63-21/40 48/63-21/20 16/63-63/20 16/63-21/60 80/63-21/20