Subtract 9/63 from 27/20, Solve 1 7/20

Subtract 9/63 from 27/20

1^st number: 1 7/20, 2^nd number: 9/63

27/20 - 9/63 is 169/140.

Find the least common denominator or LCM of the two denominators:
LCM of 20 and 63 is 1260

Next, find the equivalent fraction of both fractional numbers with denominator 1260
For the 1st fraction, since 20 × 63 = 1260,
27/20 = 27 × 63/20 × 63 = 1701/1260
Likewise, for the 2nd fraction, since 63 × 20 = 1260,
9/63 = 9 × 20/63 × 20 = 180/1260
Subtract the two like fractions:
1701/1260 - 180/1260 = 1701 - 180/1260 = 1521/1260
After reducing the fraction, the answer is 169/140
In mixed form: 129/140

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