Subtract 21/4 from 70/8
1st number: 8 6/8, 2nd number: 5 1/4
70/8 - 21/4 is 7/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 4 is 8
Next, find the equivalent fraction of both fractional numbers with denominator 8 - For the 1st fraction, since 8 × 1 = 8,
70/8 = 70 × 1/8 × 1 = 70/8 - Likewise, for the 2nd fraction, since 4 × 2 = 8,
21/4 = 21 × 2/4 × 2 = 42/8 - Subtract the two like fractions:
70/8 - 42/8 = 70 - 42/8 = 28/8 - After reducing the fraction, the answer is 7/2
- In mixed form: 31/2
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