Subtract 81/60 from 2/8, Solve 2/8 - 1 21/60 as a fraction

Subtract 81/60 from 2/8

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

2/8 - 81/60 is -11/10.

Find the least common denominator or LCM of the two denominators:
LCM of 8 and 60 is 120

Next, find the equivalent fraction of both fractional numbers with denominator 120
For the 1st fraction, since 8 × 15 = 120,
2/8 = 2 × 15/8 × 15 = 30/120
Likewise, for the 2nd fraction, since 60 × 2 = 120,
81/60 = 81 × 2/60 × 2 = 162/120
Subtract the two like fractions:
30/120 - 162/120 = 30 - 162/120 = -132/120
After reducing the fraction, the answer is -11/10

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