Subtract 64/70 from 64/90
64/90 - 64/70 is -64/315.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
64/90 = 64 × 7/90 × 7 = 448/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
64/70 = 64 × 9/70 × 9 = 576/630 - Subtract the two like fractions:
448/630 - 576/630 = 448 - 576/630 = -128/630 - After reducing the fraction, the answer is -64/315
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