Subtract 42/90 from 1/7
1/7 - 42/90 is -34/105.
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,
42/90 = 42 × 7/90 × 7 = 294/630 - Subtract the two like fractions:
90/630 - 294/630 = 90 - 294/630 = -204/630 - After reducing the fraction, the answer is -34/105
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