Subtract 21/4 from 90/9
1st number: 10 0/9, 2nd number: 5 1/4
90/9 - 21/4 is 19/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 4 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 9 × 4 = 36,
90/9 = 90 × 4/9 × 4 = 360/36 - Likewise, for the 2nd fraction, since 4 × 9 = 36,
21/4 = 21 × 9/4 × 9 = 189/36 - Subtract the two like fractions:
360/36 - 189/36 = 360 - 189/36 = 171/36 - After reducing the fraction, the answer is 19/4
- In mixed form: 43/4
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