Subtract 21/16 from 18/7
1st number: 2 4/7, 2nd number: 1 5/16
18/7 - 21/16 is 141/112.
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,
18/7 = 18 × 16/7 × 16 = 288/112 - Likewise, for the 2nd fraction, since 16 × 7 = 112,
21/16 = 21 × 7/16 × 7 = 147/112 - Subtract the two like fractions:
288/112 - 147/112 = 288 - 147/112 = 141/112 - In mixed form: 129/112
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