Subtract 21/72 from 40/21
1st number: 1 19/21, 2nd number: 21/72
40/21 - 21/72 is 271/168.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 21 × 24 = 504,
40/21 = 40 × 24/21 × 24 = 960/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
21/72 = 21 × 7/72 × 7 = 147/504 - Subtract the two like fractions:
960/504 - 147/504 = 960 - 147/504 = 813/504 - After reducing the fraction, the answer is 271/168
- In mixed form: 1103/168
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