Subtract 21/12 from 42/8
1st number: 5 2/8, 2nd number: 1 9/12
428 - 2112 is 72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 12 is 24
Next, find the equivalent fraction of both fractional numbers with denominator 24 - For the 1st fraction, since 8 × 3 = 24,
428 = 42 × 38 × 3 = 12624 - Likewise, for the 2nd fraction, since 12 × 2 = 24,
2112 = 21 × 212 × 2 = 4224 - Subtract the two like fractions:
12624 - 4224 = 126 - 4224 = 8424 - After reducing the fraction, the answer is 72
- In mixed form: 312
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