Subtract 72/21 from 24/15
1st number: 1 9/15, 2nd number: 3 9/21
24/15 - 72/21 is -64/35.
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,
24/15 = 24 × 7/15 × 7 = 168/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
72/21 = 72 × 5/21 × 5 = 360/105 - Subtract the two like fractions:
168/105 - 360/105 = 168 - 360/105 = -192/105 - After reducing the fraction, the answer is -64/35
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