Subtract 15/40 from 63/18
1st number: 3 9/18, 2nd number: 15/40
63/18 - 15/40 is 25/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 18 × 20 = 360,
63/18 = 63 × 20/18 × 20 = 1260/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
15/40 = 15 × 9/40 × 9 = 135/360 - Subtract the two like fractions:
1260/360 - 135/360 = 1260 - 135/360 = 1125/360 - After reducing the fraction, the answer is 25/8
- In mixed form: 31/8
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