Subtract 21/16 from 30/7
1st number: 4 2/7, 2nd number: 1 5/16
30/7 - 21/16 is 333/112.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 16 is 112
Next, find the equivalent fraction of both fractional numbers with denominator 112 - For the 1st fraction, since 7 × 16 = 112,
30/7 = 30 × 16/7 × 16 = 480/112 - Likewise, for the 2nd fraction, since 16 × 7 = 112,
21/16 = 21 × 7/16 × 7 = 147/112 - Subtract the two like fractions:
480/112 - 147/112 = 480 - 147/112 = 333/112 - In mixed form: 2109/112
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/7-21/16 30/7-42/16 30/14-21/16 30/7-21/32 90/7-21/16 30/7-63/16 30/21-21/16 30/7-21/48 30/35-21/16 30/7-21/80 30/49-21/16