Subtract 81/35 from 9/40, Solve 9/40

Subtract 81/35 from 9/40

1^st number: 9/40, 2^nd number: 2 11/35

9/40 - 81/35 is -117/56.

Find the least common denominator or LCM of the two denominators:
LCM of 40 and 35 is 280

Next, find the equivalent fraction of both fractional numbers with denominator 280
For the 1st fraction, since 40 × 7 = 280,
9/40 = 9 × 7/40 × 7 = 63/280
Likewise, for the 2nd fraction, since 35 × 8 = 280,
81/35 = 81 × 8/35 × 8 = 648/280
Subtract the two like fractions:
63/280 - 648/280 = 63 - 648/280 = -585/280
After reducing the fraction, the answer is -117/56

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