Subtract 40/21 from 25/15
1st number: 1 10/15, 2nd number: 1 19/21
25/15 - 40/21 is -5/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 21 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 15 × 7 = 105,
25/15 = 25 × 7/15 × 7 = 175/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
40/21 = 40 × 5/21 × 5 = 200/105 - Subtract the two like fractions:
175/105 - 200/105 = 175 - 200/105 = -25/105 - After reducing the fraction, the answer is -5/21
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