Subtract 60/63 from 64/90, Solve 64/90

Subtract 60/63 from 64/90

64/90 - 60/63 is -76/315.

Find the least common denominator or LCM of the two denominators:
LCM of 90 and 63 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 90 × 7 = 630,
64/90 = 64 × 7/90 × 7 = 448/630
Likewise, for the 2nd fraction, since 63 × 10 = 630,
60/63 = 60 × 10/63 × 10 = 600/630
Subtract the two like fractions:
448/630 - 600/630 = 448 - 600/630 = -152/630
After reducing the fraction, the answer is -76/315

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