Subtract 9/40 from 27/70, Solve 27/70

Subtract 9/40 from 27/70

27/70 - 9/40 is 9/56.

Find the least common denominator or LCM of the two denominators:
LCM of 70 and 40 is 280

Next, find the equivalent fraction of both fractional numbers with denominator 280
For the 1st fraction, since 70 × 4 = 280,
27/70 = 27 × 4/70 × 4 = 108/280
Likewise, for the 2nd fraction, since 40 × 7 = 280,
9/40 = 9 × 7/40 × 7 = 63/280
Subtract the two like fractions:
108/280 - 63/280 = 108 - 63/280 = 45/280
After reducing the fraction, the answer is 9/56

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