Subtract 9/54 from 10/84, Solve 10/84

Subtract 9/54 from 10/84

10/84 - 9/54 is -1/21.

Find the least common denominator or LCM of the two denominators:
LCM of 84 and 54 is 756

Next, find the equivalent fraction of both fractional numbers with denominator 756
For the 1st fraction, since 84 × 9 = 756,
10/84 = 10 × 9/84 × 9 = 90/756
Likewise, for the 2nd fraction, since 54 × 14 = 756,
9/54 = 9 × 14/54 × 14 = 126/756
Subtract the two like fractions:
90/756 - 126/756 = 90 - 126/756 = -36/756
After reducing the fraction, the answer is -1/21

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