Subtract 40/7 from 42/16, Solve 2 10/16

Subtract 40/7 from 42/16

1^st number: 2 10/16, 2^nd number: 5 5/7

42/16 - 40/7 is -173/56.

Find the least common denominator or LCM of the two denominators:
LCM of 16 and 7 is 112

Next, find the equivalent fraction of both fractional numbers with denominator 112
For the 1st fraction, since 16 × 7 = 112,
42/16 = 42 × 7/16 × 7 = 294/112
Likewise, for the 2nd fraction, since 7 × 16 = 112,
40/7 = 40 × 16/7 × 16 = 640/112
Subtract the two like fractions:
294/112 - 640/112 = 294 - 640/112 = -346/112
After reducing the fraction, the answer is -173/56

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