Subtract 10/15 from 40/42
40/42 - 10/15 is 2/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 15 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
40/42 = 40 × 5/42 × 5 = 200/210 - Likewise, for the 2nd fraction, since 15 × 14 = 210,
10/15 = 10 × 14/15 × 14 = 140/210 - Subtract the two like fractions:
200/210 - 140/210 = 200 - 140/210 = 60/210 - After reducing the fraction, the answer is 2/7
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