Subtract 21/28 from 30/2
1st number: 15 0/2, 2nd number: 21/28
30/2 - 21/28 is 57/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 28 is 28
Next, find the equivalent fraction of both fractional numbers with denominator 28 - For the 1st fraction, since 2 × 14 = 28,
30/2 = 30 × 14/2 × 14 = 420/28 - Likewise, for the 2nd fraction, since 28 × 1 = 28,
21/28 = 21 × 1/28 × 1 = 21/28 - Subtract the two like fractions:
420/28 - 21/28 = 420 - 21/28 = 399/28 - After reducing the fraction, the answer is 57/4
- In mixed form: 141/4
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