Subtract 10/36 from 40/42, Solve 40/42

Subtract 10/36 from 40/42

40/42 - 10/36 is 85/126.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 36 is 252

Next, find the equivalent fraction of both fractional numbers with denominator 252
For the 1st fraction, since 42 × 6 = 252,
40/42 = 40 × 6/42 × 6 = 240/252
Likewise, for the 2nd fraction, since 36 × 7 = 252,
10/36 = 10 × 7/36 × 7 = 70/252
Subtract the two like fractions:
240/252 - 70/252 = 240 - 70/252 = 170/252
After reducing the fraction, the answer is 85/126

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