Subtract 21/50 from 90/45
1st number: 2 0/45, 2nd number: 21/50
90/45 - 21/50 is 79/50.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 50 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 45 × 10 = 450,
90/45 = 90 × 10/45 × 10 = 900/450 - Likewise, for the 2nd fraction, since 50 × 9 = 450,
21/50 = 21 × 9/50 × 9 = 189/450 - Subtract the two like fractions:
900/450 - 189/450 = 900 - 189/450 = 711/450 - After reducing the fraction, the answer is 79/50
- In mixed form: 129/50
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