Subtract 18/9 from 10/84, Solve 10/84

Subtract 18/9 from 10/84

1^st number: 10/84, 2^nd number: 2 0/9

10/84 - 18/9 is -79/42.

Find the least common denominator or LCM of the two denominators:
LCM of 84 and 9 is 252

Next, find the equivalent fraction of both fractional numbers with denominator 252
For the 1st fraction, since 84 × 3 = 252,
10/84 = 10 × 3/84 × 3 = 30/252
Likewise, for the 2nd fraction, since 9 × 28 = 252,
18/9 = 18 × 28/9 × 28 = 504/252
Subtract the two like fractions:
30/252 - 504/252 = 30 - 504/252 = -474/252
After reducing the fraction, the answer is -79/42

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