Subtract 45/18 from 40/25, Solve 1 15/25

Subtract 45/18 from 40/25

1^st number: 1 15/25, 2^nd number: 2 9/18

40/25 - 45/18 is -9/10.

Find the least common denominator or LCM of the two denominators:
LCM of 25 and 18 is 450

Next, find the equivalent fraction of both fractional numbers with denominator 450
For the 1st fraction, since 25 × 18 = 450,
40/25 = 40 × 18/25 × 18 = 720/450
Likewise, for the 2nd fraction, since 18 × 25 = 450,
45/18 = 45 × 25/18 × 25 = 1125/450
Subtract the two like fractions:
720/450 - 1125/450 = 720 - 1125/450 = -405/450
After reducing the fraction, the answer is -9/10

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