Subtract 9/84 from 42/21
1st number: 2 0/21, 2nd number: 9/84
42/21 - 9/84 is 53/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 84 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
42/21 = 42 × 4/21 × 4 = 168/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
9/84 = 9 × 1/84 × 1 = 9/84 - Subtract the two like fractions:
168/84 - 9/84 = 168 - 9/84 = 159/84 - After reducing the fraction, the answer is 53/28
- In mixed form: 125/28
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