Subtract 21/4 from 90/14
1st number: 6 6/14, 2nd number: 5 1/4
90/14 - 21/4 is 33/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 4 is 28
Next, find the equivalent fraction of both fractional numbers with denominator 28 - For the 1st fraction, since 14 × 2 = 28,
90/14 = 90 × 2/14 × 2 = 180/28 - Likewise, for the 2nd fraction, since 4 × 7 = 28,
21/4 = 21 × 7/4 × 7 = 147/28 - Subtract the two like fractions:
180/28 - 147/28 = 180 - 147/28 = 33/28 - In mixed form: 15/28
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