Subtract 72/40 from 30/12, Solve 2 6/12

Subtract 72/40 from 30/12

1^st number: 2 6/12, 2^nd number: 1 32/40

30/12 - 72/40 is 7/10.

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,
30/12 = 30 × 10/12 × 10 = 300/120
Likewise, for the 2nd fraction, since 40 × 3 = 120,
72/40 = 72 × 3/40 × 3 = 216/120
Subtract the two like fractions:
300/120 - 216/120 = 300 - 216/120 = 84/120
After reducing the fraction, the answer is 7/10

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