Subtract 21/28 from 18/8
1st number: 2 2/8, 2nd number: 21/28
18/8 - 21/28 is 3/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 28 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 8 × 7 = 56,
18/8 = 18 × 7/8 × 7 = 126/56 - Likewise, for the 2nd fraction, since 28 × 2 = 56,
21/28 = 21 × 2/28 × 2 = 42/56 - Subtract the two like fractions:
126/56 - 42/56 = 126 - 42/56 = 84/56 - After reducing the fraction, the answer is 3/2
- In mixed form: 11/2
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