Subtract 40/7 from 40/18, Solve 2 4/18

Subtract 40/7 from 40/18

1^st number: 2 4/18, 2^nd number: 5 5/7

40/18 - 40/7 is -220/63.

Find the least common denominator or LCM of the two denominators:
LCM of 18 and 7 is 126

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 18 × 7 = 126,
40/18 = 40 × 7/18 × 7 = 280/126
Likewise, for the 2nd fraction, since 7 × 18 = 126,
40/7 = 40 × 18/7 × 18 = 720/126
Subtract the two like fractions:
280/126 - 720/126 = 280 - 720/126 = -440/126
After reducing the fraction, the answer is -220/63

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