Subtract 30/27 from 9/40, Solve 9/40

Subtract 30/27 from 9/40

1^st number: 9/40, 2^nd number: 1 3/27

9/40 - 30/27 is -319/360.

Find the least common denominator or LCM of the two denominators:
LCM of 40 and 27 is 1080

Next, find the equivalent fraction of both fractional numbers with denominator 1080
For the 1st fraction, since 40 × 27 = 1080,
9/40 = 9 × 27/40 × 27 = 243/1080
Likewise, for the 2nd fraction, since 27 × 40 = 1080,
30/27 = 30 × 40/27 × 40 = 1200/1080
Subtract the two like fractions:
243/1080 - 1200/1080 = 243 - 1200/1080 = -957/1080
After reducing the fraction, the answer is -319/360

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