Subtract 49/84 from 30/90, Solve 30/90

Subtract 49/84 from 30/90

30/90 - 49/84 is -1/4.

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

Next, find the equivalent fraction of both fractional numbers with denominator 1260
For the 1st fraction, since 90 × 14 = 1260,
30/90 = 30 × 14/90 × 14 = 420/1260
Likewise, for the 2nd fraction, since 84 × 15 = 1260,
49/84 = 49 × 15/84 × 15 = 735/1260
Subtract the two like fractions:
420/1260 - 735/1260 = 420 - 735/1260 = -315/1260
After reducing the fraction, the answer is -1/4

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