Subtract 4/10 from 20/90
20/90 - 4/10 is -8/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 10 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
20/90 = 20 × 1/90 × 1 = 20/90 - Likewise, for the 2nd fraction, since 10 × 9 = 90,
4/10 = 4 × 9/10 × 9 = 36/90 - Subtract the two like fractions:
20/90 - 36/90 = 20 - 36/90 = -16/90 - After reducing the fraction, the answer is -8/45
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