Subtract 9/72 from 70/21
1st number: 3 7/21, 2nd number: 9/72
70/21 - 9/72 is 77/24.
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,
70/21 = 70 × 24/21 × 24 = 1680/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
9/72 = 9 × 7/72 × 7 = 63/504 - Subtract the two like fractions:
1680/504 - 63/504 = 1680 - 63/504 = 1617/504 - After reducing the fraction, the answer is 77/24
- In mixed form: 35/24
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