Subtract 18/21 from 36/5, Solve 7 1/5

Subtract 18/21 from 36/5

1^st number: 7 1/5, 2^nd number: 18/21

36/5 - 18/21 is 222/35.

Find the least common denominator or LCM of the two denominators:
LCM of 5 and 21 is 105

Next, find the equivalent fraction of both fractional numbers with denominator 105
For the 1st fraction, since 5 × 21 = 105,
36/5 = 36 × 21/5 × 21 = 756/105
Likewise, for the 2nd fraction, since 21 × 5 = 105,
18/21 = 18 × 5/21 × 5 = 90/105
Subtract the two like fractions:
756/105 - 90/105 = 756 - 90/105 = 666/105
After reducing the fraction, the answer is 222/35
In mixed form: 612/35

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