Subtract 10/9 from 4/40, Solve 4/40

Subtract 10/9 from 4/40

1^st number: 4/40, 2^nd number: 1 1/9

4/40 - 10/9 is -91/90.

Find the least common denominator or LCM of the two denominators:
LCM of 40 and 9 is 360

Next, find the equivalent fraction of both fractional numbers with denominator 360
For the 1st fraction, since 40 × 9 = 360,
4/40 = 4 × 9/40 × 9 = 36/360
Likewise, for the 2nd fraction, since 9 × 40 = 360,
10/9 = 10 × 40/9 × 40 = 400/360
Subtract the two like fractions:
36/360 - 400/360 = 36 - 400/360 = -364/360
After reducing the fraction, the answer is -91/90

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