Subtract 40/25 from 21/12
1st number: 1 9/12, 2nd number: 1 15/25
21/12 - 40/25 is 3/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 25 is 300
Next, find the equivalent fraction of both fractional numbers with denominator 300 - For the 1st fraction, since 12 × 25 = 300,
21/12 = 21 × 25/12 × 25 = 525/300 - Likewise, for the 2nd fraction, since 25 × 12 = 300,
40/25 = 40 × 12/25 × 12 = 480/300 - Subtract the two like fractions:
525/300 - 480/300 = 525 - 480/300 = 45/300 - After reducing the fraction, the answer is 3/20
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