Subtract 9/72 from 40/10, Solve 4 0/10

Subtract 9/72 from 40/10

1^st number: 4 0/10, 2^nd number: 9/72

40/10 - 9/72 is 31/8.

Find the least common denominator or LCM of the two denominators:
LCM of 10 and 72 is 360

Next, find the equivalent fraction of both fractional numbers with denominator 360
For the 1st fraction, since 10 × 36 = 360,
40/10 = 40 × 36/10 × 36 = 1440/360
Likewise, for the 2nd fraction, since 72 × 5 = 360,
9/72 = 9 × 5/72 × 5 = 45/360
Subtract the two like fractions:
1440/360 - 45/360 = 1440 - 45/360 = 1395/360
After reducing the fraction, the answer is 31/8
In mixed form: 37/8

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