Subtract 40/7 from 72/15
1st number: 4 12/15, 2nd number: 5 5/7
72/15 - 40/7 is -32/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 7 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 15 × 7 = 105,
72/15 = 72 × 7/15 × 7 = 504/105 - Likewise, for the 2nd fraction, since 7 × 15 = 105,
40/7 = 40 × 15/7 × 15 = 600/105 - Subtract the two like fractions:
504/105 - 600/105 = 504 - 600/105 = -96/105 - After reducing the fraction, the answer is -32/35
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