Subtract 63/42 from 81/9
1st number: 9 0/9, 2nd number: 1 21/42
81/9 - 63/42 is 15/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 42 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 9 × 14 = 126,
81/9 = 81 × 14/9 × 14 = 1134/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
63/42 = 63 × 3/42 × 3 = 189/126 - Subtract the two like fractions:
1134/126 - 189/126 = 1134 - 189/126 = 945/126 - After reducing the fraction, the answer is 15/2
- In mixed form: 71/2
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