Subtract 9/42 from 20/28
20/28 - 9/42 is 1/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 42 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 28 × 3 = 84,
20/28 = 20 × 3/28 × 3 = 60/84 - Likewise, for the 2nd fraction, since 42 × 2 = 84,
9/42 = 9 × 2/42 × 2 = 18/84 - Subtract the two like fractions:
60/84 - 18/84 = 60 - 18/84 = 42/84 - After reducing the fraction, the answer is 1/2
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