Subtract 16/9 from 21/72
1st number: 21/72, 2nd number: 1 7/9
21/72 - 16/9 is -107/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 9 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 72 × 1 = 72,
21/72 = 21 × 1/72 × 1 = 21/72 - Likewise, for the 2nd fraction, since 9 × 8 = 72,
16/9 = 16 × 8/9 × 8 = 128/72 - Subtract the two like fractions:
21/72 - 128/72 = 21 - 128/72 = -107/72
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