Subtract 18/40 from 60/12, Solve 5 0/12

Subtract 18/40 from 60/12

1^st number: 5 0/12, 2^nd number: 18/40

60/12 - 18/40 is 91/20.

Find the least common denominator or LCM of the two denominators:
LCM of 12 and 40 is 120

Next, find the equivalent fraction of both fractional numbers with denominator 120
For the 1st fraction, since 12 × 10 = 120,
60/12 = 60 × 10/12 × 10 = 600/120
Likewise, for the 2nd fraction, since 40 × 3 = 120,
18/40 = 18 × 3/40 × 3 = 54/120
Subtract the two like fractions:
600/120 - 54/120 = 600 - 54/120 = 546/120
After reducing the fraction, the answer is 91/20
In mixed form: 411/20

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