Subtract 25/21 from 15/35
1st number: 15/35, 2nd number: 1 4/21
15/35 - 25/21 is -16/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 21 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 35 × 3 = 105,
15/35 = 15 × 3/35 × 3 = 45/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
25/21 = 25 × 5/21 × 5 = 125/105 - Subtract the two like fractions:
45/105 - 125/105 = 45 - 125/105 = -80/105 - After reducing the fraction, the answer is -16/21
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