Subtract 21/8 from 7/2
1st number: 3 1/2, 2nd number: 2 5/8
72 - 218 is 78.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 8 is 8
Next, find the equivalent fraction of both fractional numbers with denominator 8 - For the 1st fraction, since 2 × 4 = 8,
72 = 7 × 42 × 4 = 288 - Likewise, for the 2nd fraction, since 8 × 1 = 8,
218 = 21 × 18 × 1 = 218 - Subtract the two like fractions:
288 - 218 = 28 - 218 = 78
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