Subtract 20/45 from 7/2
1st number: 3 1/2, 2nd number: 20/45
7/2 - 20/45 is 55/18.
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,
7/2 = 7 × 45/2 × 45 = 315/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
20/45 = 20 × 2/45 × 2 = 40/90 - Subtract the two like fractions:
315/90 - 40/90 = 315 - 40/90 = 275/90 - After reducing the fraction, the answer is 55/18
- In mixed form: 31/18
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