Subtract 90/84 from 90/60, Solve 1 30/60

Subtract 90/84 from 90/60

1^st number: 1 30/60, 2^nd number: 1 6/84

90/60 - 90/84 is 3/7.

Find the least common denominator or LCM of the two denominators:
LCM of 60 and 84 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 60 × 7 = 420,
90/60 = 90 × 7/60 × 7 = 630/420
Likewise, for the 2nd fraction, since 84 × 5 = 420,
90/84 = 90 × 5/84 × 5 = 450/420
Subtract the two like fractions:
630/420 - 450/420 = 630 - 450/420 = 180/420
After reducing the fraction, the answer is 3/7

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