Subtract 18/70 from 50/42, Solve 1 8/42

Subtract 18/70 from 50/42

1^st number: 1 8/42, 2^nd number: 18/70

50/42 - 18/70 is 14/15.

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

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 42 × 5 = 210,
50/42 = 50 × 5/42 × 5 = 250/210
Likewise, for the 2nd fraction, since 70 × 3 = 210,
18/70 = 18 × 3/70 × 3 = 54/210
Subtract the two like fractions:
250/210 - 54/210 = 250 - 54/210 = 196/210
After reducing the fraction, the answer is 14/15

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