Subtract 21/60 from 7/8, Solve 7/8

Subtract 21/60 from 7/8

7/8 - 21/60 is 21/40.

Find the least common denominator or LCM of the two denominators:
LCM of 8 and 60 is 120

Next, find the equivalent fraction of both fractional numbers with denominator 120
For the 1st fraction, since 8 × 15 = 120,
7/8 = 7 × 15/8 × 15 = 105/120
Likewise, for the 2nd fraction, since 60 × 2 = 120,
21/60 = 21 × 2/60 × 2 = 42/120
Subtract the two like fractions:
105/120 - 42/120 = 105 - 42/120 = 63/120
After reducing the fraction, the answer is 21/40

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