Subtract 9/7 from 36/40, Solve 36/40

Subtract 9/7 from 36/40

1^st number: 36/40, 2^nd number: 1 2/7

36/40 - 9/7 is -27/70.

Find the least common denominator or LCM of the two denominators:
LCM of 40 and 7 is 280

Next, find the equivalent fraction of both fractional numbers with denominator 280
For the 1st fraction, since 40 × 7 = 280,
36/40 = 36 × 7/40 × 7 = 252/280
Likewise, for the 2nd fraction, since 7 × 40 = 280,
9/7 = 9 × 40/7 × 40 = 360/280
Subtract the two like fractions:
252/280 - 360/280 = 252 - 360/280 = -108/280
After reducing the fraction, the answer is -27/70

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