Subtract 12/21 from 8/4
1st number: 2 0/4, 2nd number: 12/21
8/4 - 12/21 is 10/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 4 × 21 = 84,
8/4 = 8 × 21/4 × 21 = 168/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
12/21 = 12 × 4/21 × 4 = 48/84 - Subtract the two like fractions:
168/84 - 48/84 = 168 - 48/84 = 120/84 - After reducing the fraction, the answer is 10/7
- In mixed form: 13/7
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