Subtract 9/90 from 9/84, Solve 9/84

Subtract 9/90 from 9/84

9/84 - 9/90 is 1/140.

Find the least common denominator or LCM of the two denominators:
LCM of 84 and 90 is 1260

Next, find the equivalent fraction of both fractional numbers with denominator 1260
For the 1st fraction, since 84 × 15 = 1260,
9/84 = 9 × 15/84 × 15 = 135/1260
Likewise, for the 2nd fraction, since 90 × 14 = 1260,
9/90 = 9 × 14/90 × 14 = 126/1260
Subtract the two like fractions:
135/1260 - 126/1260 = 135 - 126/1260 = 9/1260
After reducing the fraction, the answer is 1/140

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