Subtract 6/7 from 4/90
4/90 - 6/7 is -256/315.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 7 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
4/90 = 4 × 7/90 × 7 = 28/630 - Likewise, for the 2nd fraction, since 7 × 90 = 630,
6/7 = 6 × 90/7 × 90 = 540/630 - Subtract the two like fractions:
28/630 - 540/630 = 28 - 540/630 = -512/630 - After reducing the fraction, the answer is -256/315
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