Subtract 90/72 from 6/84, Solve 6/84

Subtract 90/72 from 6/84

1^st number: 6/84, 2^nd number: 1 18/72

6/84 - 90/72 is -33/28.

Find the least common denominator or LCM of the two denominators:
LCM of 84 and 72 is 504

Next, find the equivalent fraction of both fractional numbers with denominator 504
For the 1st fraction, since 84 × 6 = 504,
6/84 = 6 × 6/84 × 6 = 36/504
Likewise, for the 2nd fraction, since 72 × 7 = 504,
90/72 = 90 × 7/72 × 7 = 630/504
Subtract the two like fractions:
36/504 - 630/504 = 36 - 630/504 = -594/504
After reducing the fraction, the answer is -33/28

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