Subtract 21/16 from 81/7
1st number: 11 4/7, 2nd number: 1 5/16
81/7 - 21/16 is 1149/112.
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,
81/7 = 81 × 16/7 × 16 = 1296/112 - Likewise, for the 2nd fraction, since 16 × 7 = 112,
21/16 = 21 × 7/16 × 7 = 147/112 - Subtract the two like fractions:
1296/112 - 147/112 = 1296 - 147/112 = 1149/112 - In mixed form: 1029/112
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