Subtract 8/81 from 81/60, Solve 1 21/60

Subtract 8/81 from 81/60

1^st number: 1 21/60, 2^nd number: 8/81

81/60 - 8/81 is 2027/1620.

Find the least common denominator or LCM of the two denominators:
LCM of 60 and 81 is 1620

Next, find the equivalent fraction of both fractional numbers with denominator 1620
For the 1st fraction, since 60 × 27 = 1620,
81/60 = 81 × 27/60 × 27 = 2187/1620
Likewise, for the 2nd fraction, since 81 × 20 = 1620,
8/81 = 8 × 20/81 × 20 = 160/1620
Subtract the two like fractions:
2187/1620 - 160/1620 = 2187 - 160/1620 = 2027/1620
In mixed form: 1407/1620

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