Subtract 30/64 from 1/42, Solve 1/42

Subtract 30/64 from 1/42

1/42 - 30/64 is -299/672.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 64 is 1344

Next, find the equivalent fraction of both fractional numbers with denominator 1344
For the 1st fraction, since 42 × 32 = 1344,
1/42 = 1 × 32/42 × 32 = 32/1344
Likewise, for the 2nd fraction, since 64 × 21 = 1344,
30/64 = 30 × 21/64 × 21 = 630/1344
Subtract the two like fractions:
32/1344 - 630/1344 = 32 - 630/1344 = -598/1344
After reducing the fraction, the answer is -299/672

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