Subtract 4/5 from 2/90
2/90 - 4/5 is -7/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 5 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
2/90 = 2 × 1/90 × 1 = 2/90 - Likewise, for the 2nd fraction, since 5 × 18 = 90,
4/5 = 4 × 18/5 × 18 = 72/90 - Subtract the two like fractions:
2/90 - 72/90 = 2 - 72/90 = -70/90 - After reducing the fraction, the answer is -7/9
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