Subtract 4/60 from 64/21, Solve 3 1/21

Subtract 4/60 from 64/21

1^st number: 3 1/21, 2^nd number: 4/60

64/21 - 4/60 is 313/105.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 60 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 21 × 20 = 420,
64/21 = 64 × 20/21 × 20 = 1280/420
Likewise, for the 2nd fraction, since 60 × 7 = 420,
4/60 = 4 × 7/60 × 7 = 28/420
Subtract the two like fractions:
1280/420 - 28/420 = 1280 - 28/420 = 1252/420
After reducing the fraction, the answer is 313/105
In mixed form: 2103/105

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