Subtract 18/90 from 1/7
1/7 - 18/90 is -2/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 7 × 90 = 630,
1/7 = 1 × 90/7 × 90 = 90/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
18/90 = 18 × 7/90 × 7 = 126/630 - Subtract the two like fractions:
90/630 - 126/630 = 90 - 126/630 = -36/630 - After reducing the fraction, the answer is -2/35
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