Subtract 70/75 from 49/90, Solve 49/90

Subtract 70/75 from 49/90

49/90 - 70/75 is -7/18.

Find the least common denominator or LCM of the two denominators:
LCM of 90 and 75 is 450

Next, find the equivalent fraction of both fractional numbers with denominator 450
For the 1st fraction, since 90 × 5 = 450,
49/90 = 49 × 5/90 × 5 = 245/450
Likewise, for the 2nd fraction, since 75 × 6 = 450,
70/75 = 70 × 6/75 × 6 = 420/450
Subtract the two like fractions:
245/450 - 420/450 = 245 - 420/450 = -175/450
After reducing the fraction, the answer is -7/18

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