Subtract 40/42 from 75/70, Solve 1 5/70

Subtract 40/42 from 75/70

1^st number: 1 5/70, 2^nd number: 40/42

75/70 - 40/42 is 5/42.

Find the least common denominator or LCM of the two denominators:
LCM of 70 and 42 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 70 × 3 = 210,
75/70 = 75 × 3/70 × 3 = 225/210
Likewise, for the 2nd fraction, since 42 × 5 = 210,
40/42 = 40 × 5/42 × 5 = 200/210
Subtract the two like fractions:
225/210 - 200/210 = 225 - 200/210 = 25/210
After reducing the fraction, the answer is 5/42

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