Subtract 42/63 from 64/90, Solve 64/90

Subtract 42/63 from 64/90

64/90 - 42/63 is 2/45.

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,
42/63 = 42 × 10/63 × 10 = 420/630
Subtract the two like fractions:
448/630 - 420/630 = 448 - 420/630 = 28/630
After reducing the fraction, the answer is 2/45

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