Subtract 20/64 from 7/45
7/45 - 20/64 is -113/720.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 64 is 2880
Next, find the equivalent fraction of both fractional numbers with denominator 2880 - For the 1st fraction, since 45 × 64 = 2880,
7/45 = 7 × 64/45 × 64 = 448/2880 - Likewise, for the 2nd fraction, since 64 × 45 = 2880,
20/64 = 20 × 45/64 × 45 = 900/2880 - Subtract the two like fractions:
448/2880 - 900/2880 = 448 - 900/2880 = -452/2880 - After reducing the fraction, the answer is -113/720
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