Subtract 15/40 from 63/42
1st number: 1 21/42, 2nd number: 15/40
63/42 - 15/40 is 9/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 42 × 20 = 840,
63/42 = 63 × 20/42 × 20 = 1260/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
15/40 = 15 × 21/40 × 21 = 315/840 - Subtract the two like fractions:
1260/840 - 315/840 = 1260 - 315/840 = 945/840 - After reducing the fraction, the answer is 9/8
- In mixed form: 11/8
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