Subtract 4/10 from 84/64, Solve 1 20/64

Subtract 4/10 from 84/64

1^st number: 1 20/64, 2^nd number: 4/10

84/64 - 4/10 is 73/80.

Find the least common denominator or LCM of the two denominators:
LCM of 64 and 10 is 320

Next, find the equivalent fraction of both fractional numbers with denominator 320
For the 1st fraction, since 64 × 5 = 320,
84/64 = 84 × 5/64 × 5 = 420/320
Likewise, for the 2nd fraction, since 10 × 32 = 320,
4/10 = 4 × 32/10 × 32 = 128/320
Subtract the two like fractions:
420/320 - 128/320 = 420 - 128/320 = 292/320
After reducing the fraction, the answer is 73/80

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