Subtract 21/4 from 90/2
1st number: 45 0/2, 2nd number: 5 1/4
90/2 - 21/4 is 159/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 4 is 4
Next, find the equivalent fraction of both fractional numbers with denominator 4 - For the 1st fraction, since 2 × 2 = 4,
90/2 = 90 × 2/2 × 2 = 180/4 - Likewise, for the 2nd fraction, since 4 × 1 = 4,
21/4 = 21 × 1/4 × 1 = 21/4 - Subtract the two like fractions:
180/4 - 21/4 = 180 - 21/4 = 159/4 - In mixed form: 393/4
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