Subtract 18/7 from 63/60, Solve 1 3/60

Subtract 18/7 from 63/60

1^st number: 1 3/60, 2^nd number: 2 4/7

63/60 - 18/7 is -213/140.

Find the least common denominator or LCM of the two denominators:
LCM of 60 and 7 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 60 × 7 = 420,
63/60 = 63 × 7/60 × 7 = 441/420
Likewise, for the 2nd fraction, since 7 × 60 = 420,
18/7 = 18 × 60/7 × 60 = 1080/420
Subtract the two like fractions:
441/420 - 1080/420 = 441 - 1080/420 = -639/420
After reducing the fraction, the answer is -213/140

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