Subtract 70/90 from 80/75, Solve 1 5/75

Subtract 70/90 from 80/75

1^st number: 1 5/75, 2^nd number: 70/90

80/75 - 70/90 is 13/45.

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

Next, find the equivalent fraction of both fractional numbers with denominator 450
For the 1st fraction, since 75 × 6 = 450,
80/75 = 80 × 6/75 × 6 = 480/450
Likewise, for the 2nd fraction, since 90 × 5 = 450,
70/90 = 70 × 5/90 × 5 = 350/450
Subtract the two like fractions:
480/450 - 350/450 = 480 - 350/450 = 130/450
After reducing the fraction, the answer is 13/45

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