Subtract 72/9 from 21/3
1st number: 7 0/3, 2nd number: 8 0/9
21/3 - 72/9 is -1/1.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 9 is 9
Next, find the equivalent fraction of both fractional numbers with denominator 9 - For the 1st fraction, since 3 × 3 = 9,
21/3 = 21 × 3/3 × 3 = 63/9 - Likewise, for the 2nd fraction, since 9 × 1 = 9,
72/9 = 72 × 1/9 × 1 = 72/9 - Subtract the two like fractions:
63/9 - 72/9 = 63 - 72/9 = -9/9 - After reducing the fraction, the answer is -1/1
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