Subtract 21/72 from 7/5, Solve 1 2/5

Subtract 21/72 from 7/5

1^st number: 1 2/5, 2^nd number: 21/72

7/5 - 21/72 is 133/120.

Find the least common denominator or LCM of the two denominators:
LCM of 5 and 72 is 360

Next, find the equivalent fraction of both fractional numbers with denominator 360
For the 1st fraction, since 5 × 72 = 360,
7/5 = 7 × 72/5 × 72 = 504/360
Likewise, for the 2nd fraction, since 72 × 5 = 360,
21/72 = 21 × 5/72 × 5 = 105/360
Subtract the two like fractions:
504/360 - 105/360 = 504 - 105/360 = 399/360
After reducing the fraction, the answer is 133/120
In mixed form: 113/120

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