Subtract 40/70 from 64/90, Solve 64/90

Subtract 40/70 from 64/90

64/90 - 40/70 is 44/315.

Find the least common denominator or LCM of the two denominators:
LCM of 90 and 70 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 70 × 9 = 630,
40/70 = 40 × 9/70 × 9 = 360/630
Subtract the two like fractions:
448/630 - 360/630 = 448 - 360/630 = 88/630
After reducing the fraction, the answer is 44/315

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