Subtract 21/9 from 72/35
1st number: 2 2/35, 2nd number: 2 3/9
72/35 - 21/9 is -29/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 9 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 35 × 9 = 315,
72/35 = 72 × 9/35 × 9 = 648/315 - Likewise, for the 2nd fraction, since 9 × 35 = 315,
21/9 = 21 × 35/9 × 35 = 735/315 - Subtract the two like fractions:
648/315 - 735/315 = 648 - 735/315 = -87/315 - After reducing the fraction, the answer is -29/105
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