Subtract 90/84 from 36/20, Solve 1 16/20

Subtract 90/84 from 36/20

1^st number: 1 16/20, 2^nd number: 1 6/84

36/20 - 90/84 is 51/70.

Find the least common denominator or LCM of the two denominators:
LCM of 20 and 84 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 20 × 21 = 420,
36/20 = 36 × 21/20 × 21 = 756/420
Likewise, for the 2nd fraction, since 84 × 5 = 420,
90/84 = 90 × 5/84 × 5 = 450/420
Subtract the two like fractions:
756/420 - 450/420 = 756 - 450/420 = 306/420
After reducing the fraction, the answer is 51/70

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