Subtract 21/16 from 10/15, Solve 10/15

Subtract 21/16 from 10/15

1^st number: 10/15, 2^nd number: 1 5/16

10/15 - 21/16 is -31/48.

Find the least common denominator or LCM of the two denominators:
LCM of 15 and 16 is 240

Next, find the equivalent fraction of both fractional numbers with denominator 240
For the 1st fraction, since 15 × 16 = 240,
10/15 = 10 × 16/15 × 16 = 160/240
Likewise, for the 2nd fraction, since 16 × 15 = 240,
21/16 = 21 × 15/16 × 15 = 315/240
Subtract the two like fractions:
160/240 - 315/240 = 160 - 315/240 = -155/240
After reducing the fraction, the answer is -31/48

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