Subtract 9/72 from 40/2, Solve 20 0/2

Subtract 9/72 from 40/2

1^st number: 20 0/2, 2^nd number: 9/72

40/2 - 9/72 is 159/8.

Find the least common denominator or LCM of the two denominators:
LCM of 2 and 72 is 72

Next, find the equivalent fraction of both fractional numbers with denominator 72
For the 1st fraction, since 2 × 36 = 72,
40/2 = 40 × 36/2 × 36 = 1440/72
Likewise, for the 2nd fraction, since 72 × 1 = 72,
9/72 = 9 × 1/72 × 1 = 9/72
Subtract the two like fractions:
1440/72 - 9/72 = 1440 - 9/72 = 1431/72
After reducing the fraction, the answer is 159/8
In mixed form: 197/8

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