Subtract 63/45 from 9/40, Solve 9/40

Subtract 63/45 from 9/40

1^st number: 9/40, 2^nd number: 1 18/45

9/40 - 63/45 is -47/40.

Find the least common denominator or LCM of the two denominators:
LCM of 40 and 45 is 360

Next, find the equivalent fraction of both fractional numbers with denominator 360
For the 1st fraction, since 40 × 9 = 360,
9/40 = 9 × 9/40 × 9 = 81/360
Likewise, for the 2nd fraction, since 45 × 8 = 360,
63/45 = 63 × 8/45 × 8 = 504/360
Subtract the two like fractions:
81/360 - 504/360 = 81 - 504/360 = -423/360
After reducing the fraction, the answer is -47/40

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