Subtract 20/9 from 7/45
1st number: 7/45, 2nd number: 2 2/9
7/45 - 20/9 is -31/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 9 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 45 × 1 = 45,
7/45 = 7 × 1/45 × 1 = 7/45 - Likewise, for the 2nd fraction, since 9 × 5 = 45,
20/9 = 20 × 5/9 × 5 = 100/45 - Subtract the two like fractions:
7/45 - 100/45 = 7 - 100/45 = -93/45 - After reducing the fraction, the answer is -31/15
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