Subtract 21/42 from 84/8
1st number: 10 4/8, 2nd number: 21/42
84/8 - 21/42 is 10/1.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 42 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 8 × 21 = 168,
84/8 = 84 × 21/8 × 21 = 1764/168 - Likewise, for the 2nd fraction, since 42 × 4 = 168,
21/42 = 21 × 4/42 × 4 = 84/168 - Subtract the two like fractions:
1764/168 - 84/168 = 1764 - 84/168 = 1680/168 - After reducing the fraction, the answer is 10/1
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