Subtract 15/90 from 7/64, Solve 7/64

Subtract 15/90 from 7/64

7/64 - 15/90 is -11/192.

Find the least common denominator or LCM of the two denominators:
LCM of 64 and 90 is 2880

Next, find the equivalent fraction of both fractional numbers with denominator 2880
For the 1st fraction, since 64 × 45 = 2880,
7/64 = 7 × 45/64 × 45 = 315/2880
Likewise, for the 2nd fraction, since 90 × 32 = 2880,
15/90 = 15 × 32/90 × 32 = 480/2880
Subtract the two like fractions:
315/2880 - 480/2880 = 315 - 480/2880 = -165/2880
After reducing the fraction, the answer is -11/192

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