Subtract 72/42 from 25/20
1st number: 1 5/20, 2nd number: 1 30/42
25/20 - 72/42 is -13/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 42 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
25/20 = 25 × 21/20 × 21 = 525/420 - Likewise, for the 2nd fraction, since 42 × 10 = 420,
72/42 = 72 × 10/42 × 10 = 720/420 - Subtract the two like fractions:
525/420 - 720/420 = 525 - 720/420 = -195/420 - After reducing the fraction, the answer is -13/28
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