Subtract 27/16 from 21/7
1st number: 3 0/7, 2nd number: 1 11/16
21/7 - 27/16 is 21/16.
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,
21/7 = 21 × 16/7 × 16 = 336/112 - Likewise, for the 2nd fraction, since 16 × 7 = 112,
27/16 = 27 × 7/16 × 7 = 189/112 - Subtract the two like fractions:
336/112 - 189/112 = 336 - 189/112 = 147/112 - After reducing the fraction, the answer is 21/16
- In mixed form: 15/16
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/7-27/16 21/7-54/16 21/14-27/16 21/7-27/32 63/7-27/16 21/7-81/16 21/7-27/48 21/35-27/16 21/7-27/80 21/49-27/16