Subtract 6/72 from 90/40, Solve 2 10/40

Subtract 6/72 from 90/40

1^st number: 2 10/40, 2^nd number: 6/72

90/40 - 6/72 is 13/6.

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

Next, find the equivalent fraction of both fractional numbers with denominator 360
For the 1st fraction, since 40 × 9 = 360,
90/40 = 90 × 9/40 × 9 = 810/360
Likewise, for the 2nd fraction, since 72 × 5 = 360,
6/72 = 6 × 5/72 × 5 = 30/360
Subtract the two like fractions:
810/360 - 30/360 = 810 - 30/360 = 780/360
After reducing the fraction, the answer is 13/6
In mixed form: 21/6

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