Subtract 15/18 from 75/42
1st number: 1 33/42, 2nd number: 15/18
75/42 - 15/18 is 20/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 42 × 3 = 126,
75/42 = 75 × 3/42 × 3 = 225/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
15/18 = 15 × 7/18 × 7 = 105/126 - Subtract the two like fractions:
225/126 - 105/126 = 225 - 105/126 = 120/126 - After reducing the fraction, the answer is 20/21
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