Subtract 30/12 from 40/25, Solve 1 15/25

Subtract 30/12 from 40/25

1^st number: 1 15/25, 2^nd number: 2 6/12

40/25 - 30/12 is -9/10.

Find the least common denominator or LCM of the two denominators:
LCM of 25 and 12 is 300

Next, find the equivalent fraction of both fractional numbers with denominator 300
For the 1st fraction, since 25 × 12 = 300,
40/25 = 40 × 12/25 × 12 = 480/300
Likewise, for the 2nd fraction, since 12 × 25 = 300,
30/12 = 30 × 25/12 × 25 = 750/300
Subtract the two like fractions:
480/300 - 750/300 = 480 - 750/300 = -270/300
After reducing the fraction, the answer is -9/10

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