Subtract 5/4 from 18/42
1st number: 18/42, 2nd number: 1 1/4
18/42 - 5/4 is -23/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 4 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 42 × 2 = 84,
18/42 = 18 × 2/42 × 2 = 36/84 - Likewise, for the 2nd fraction, since 4 × 21 = 84,
5/4 = 5 × 21/4 × 21 = 105/84 - Subtract the two like fractions:
36/84 - 105/84 = 36 - 105/84 = -69/84 - After reducing the fraction, the answer is -23/28
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