Subtract 45/21 from 63/60, Solve 1 3/60

Subtract 45/21 from 63/60

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

63/60 - 45/21 is -153/140.

Find the least common denominator or LCM of the two denominators:
LCM of 60 and 21 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 21 × 20 = 420,
45/21 = 45 × 20/21 × 20 = 900/420
Subtract the two like fractions:
441/420 - 900/420 = 441 - 900/420 = -459/420
After reducing the fraction, the answer is -153/140

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