Subtract 7/9 from 42/90
42/90 - 7/9 is -14/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 9 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
42/90 = 42 × 1/90 × 1 = 42/90 - Likewise, for the 2nd fraction, since 9 × 10 = 90,
7/9 = 7 × 10/9 × 10 = 70/90 - Subtract the two like fractions:
42/90 - 70/90 = 42 - 70/90 = -28/90 - After reducing the fraction, the answer is -14/45
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