Subtract 20/45 from 5/2
1st number: 2 1/2, 2nd number: 20/45
5/2 - 20/45 is 37/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 45 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 2 × 45 = 90,
5/2 = 5 × 45/2 × 45 = 225/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
20/45 = 20 × 2/45 × 2 = 40/90 - Subtract the two like fractions:
225/90 - 40/90 = 225 - 40/90 = 185/90 - After reducing the fraction, the answer is 37/18
- In mixed form: 21/18
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