Subtract 40/35 from 21/72
1st number: 21/72, 2nd number: 1 5/35
21/72 - 40/35 is -143/168.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 35 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 72 × 35 = 2520,
21/72 = 21 × 35/72 × 35 = 735/2520 - Likewise, for the 2nd fraction, since 35 × 72 = 2520,
40/35 = 40 × 72/35 × 72 = 2880/2520 - Subtract the two like fractions:
735/2520 - 2880/2520 = 735 - 2880/2520 = -2145/2520 - After reducing the fraction, the answer is -143/168
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