Subtract 90/60 from 5/42, Solve 5/42

Subtract 90/60 from 5/42

1^st number: 5/42, 2^nd number: 1 30/60

5/42 - 90/60 is -29/21.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 60 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 42 × 10 = 420,
5/42 = 5 × 10/42 × 10 = 50/420
Likewise, for the 2nd fraction, since 60 × 7 = 420,
90/60 = 90 × 7/60 × 7 = 630/420
Subtract the two like fractions:
50/420 - 630/420 = 50 - 630/420 = -580/420
After reducing the fraction, the answer is -29/21

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