Subtract 45/40 from 9/72, Solve 9/72

Subtract 45/40 from 9/72

1^st number: 9/72, 2^nd number: 1 5/40

9/72 - 45/40 is -1/1.

Find the least common denominator or LCM of the two denominators:
LCM of 72 and 40 is 360

Next, find the equivalent fraction of both fractional numbers with denominator 360
For the 1st fraction, since 72 × 5 = 360,
9/72 = 9 × 5/72 × 5 = 45/360
Likewise, for the 2nd fraction, since 40 × 9 = 360,
45/40 = 45 × 9/40 × 9 = 405/360
Subtract the two like fractions:
45/360 - 405/360 = 45 - 405/360 = -360/360
After reducing the fraction, the answer is -1/1

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