Subtract 75/90 from 70/49, Solve 1 21/49

Subtract 75/90 from 70/49

1^st number: 1 21/49, 2^nd number: 75/90

70/49 - 75/90 is 25/42.

Find the least common denominator or LCM of the two denominators:
LCM of 49 and 90 is 4410

Next, find the equivalent fraction of both fractional numbers with denominator 4410
For the 1st fraction, since 49 × 90 = 4410,
70/49 = 70 × 90/49 × 90 = 6300/4410
Likewise, for the 2nd fraction, since 90 × 49 = 4410,
75/90 = 75 × 49/90 × 49 = 3675/4410
Subtract the two like fractions:
6300/4410 - 3675/4410 = 6300 - 3675/4410 = 2625/4410
After reducing the fraction, the answer is 25/42

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