Subtract 12/63 from 40/21
1st number: 1 19/21, 2nd number: 12/63
40/21 - 12/63 is 12/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 63 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 21 × 3 = 63,
40/21 = 40 × 3/21 × 3 = 120/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
12/63 = 12 × 1/63 × 1 = 12/63 - Subtract the two like fractions:
120/63 - 12/63 = 120 - 12/63 = 108/63 - After reducing the fraction, the answer is 12/7
- In mixed form: 15/7
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