Subtract 21/24 from 84/42
1st number: 2 0/42, 2nd number: 21/24
84/42 - 21/24 is 9/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 24 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 42 × 4 = 168,
84/42 = 84 × 4/42 × 4 = 336/168 - Likewise, for the 2nd fraction, since 24 × 7 = 168,
21/24 = 21 × 7/24 × 7 = 147/168 - Subtract the two like fractions:
336/168 - 147/168 = 336 - 147/168 = 189/168 - After reducing the fraction, the answer is 9/8
- In mixed form: 11/8
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