Subtract 21/7 from 15/25
1st number: 15/25, 2nd number: 3 0/7
15/25 - 21/7 is -12/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 7 is 175
Next, find the equivalent fraction of both fractional numbers with denominator 175 - For the 1st fraction, since 25 × 7 = 175,
15/25 = 15 × 7/25 × 7 = 105/175 - Likewise, for the 2nd fraction, since 7 × 25 = 175,
21/7 = 21 × 25/7 × 25 = 525/175 - Subtract the two like fractions:
105/175 - 525/175 = 105 - 525/175 = -420/175 - After reducing the fraction, the answer is -12/5
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