Subtract 42/60 from 90/70, Solve 1 20/70

Subtract 42/60 from 90/70

1^st number: 1 20/70, 2^nd number: 42/60

90/70 - 42/60 is 41/70.

Find the least common denominator or LCM of the two denominators:
LCM of 70 and 60 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 70 × 6 = 420,
90/70 = 90 × 6/70 × 6 = 540/420
Likewise, for the 2nd fraction, since 60 × 7 = 420,
42/60 = 42 × 7/60 × 7 = 294/420
Subtract the two like fractions:
540/420 - 294/420 = 540 - 294/420 = 246/420
After reducing the fraction, the answer is 41/70

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