Subtract 8/21 from 40/16, Solve 2 8/16

Subtract 8/21 from 40/16

1^st number: 2 8/16, 2^nd number: 8/21

40/16 - 8/21 is 89/42.

Find the least common denominator or LCM of the two denominators:
LCM of 16 and 21 is 336

Next, find the equivalent fraction of both fractional numbers with denominator 336
For the 1st fraction, since 16 × 21 = 336,
40/16 = 40 × 21/16 × 21 = 840/336
Likewise, for the 2nd fraction, since 21 × 16 = 336,
8/21 = 8 × 16/21 × 16 = 128/336
Subtract the two like fractions:
840/336 - 128/336 = 840 - 128/336 = 712/336
After reducing the fraction, the answer is 89/42
In mixed form: 25/42

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