Subtract 4/30 from 42/64, Solve 42/64

Subtract 4/30 from 42/64

42/64 - 4/30 is 251/480.

Find the least common denominator or LCM of the two denominators:
LCM of 64 and 30 is 960

Next, find the equivalent fraction of both fractional numbers with denominator 960
For the 1st fraction, since 64 × 15 = 960,
42/64 = 42 × 15/64 × 15 = 630/960
Likewise, for the 2nd fraction, since 30 × 32 = 960,
4/30 = 4 × 32/30 × 32 = 128/960
Subtract the two like fractions:
630/960 - 128/960 = 630 - 128/960 = 502/960
After reducing the fraction, the answer is 251/480

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