Subtract 80/18 from 7/84, Solve 7/84

Subtract 80/18 from 7/84

1^st number: 7/84, 2^nd number: 4 8/18

7/84 - 80/18 is -157/36.

Find the least common denominator or LCM of the two denominators:
LCM of 84 and 18 is 252

Next, find the equivalent fraction of both fractional numbers with denominator 252
For the 1st fraction, since 84 × 3 = 252,
7/84 = 7 × 3/84 × 3 = 21/252
Likewise, for the 2nd fraction, since 18 × 14 = 252,
80/18 = 80 × 14/18 × 14 = 1120/252
Subtract the two like fractions:
21/252 - 1120/252 = 21 - 1120/252 = -1099/252
After reducing the fraction, the answer is -157/36

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