Subtract 7/72 from 20/9
1st number: 2 2/9, 2nd number: 7/72
20/9 - 7/72 is 17/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 72 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 9 × 8 = 72,
20/9 = 20 × 8/9 × 8 = 160/72 - Likewise, for the 2nd fraction, since 72 × 1 = 72,
7/72 = 7 × 1/72 × 1 = 7/72 - Subtract the two like fractions:
160/72 - 7/72 = 160 - 7/72 = 153/72 - After reducing the fraction, the answer is 17/8
- In mixed form: 21/8
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