Subtract 20/8 from 80/90
1st number: 80/90, 2nd number: 2 4/8
80/90 - 20/8 is -29/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 8 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 90 × 4 = 360,
80/90 = 80 × 4/90 × 4 = 320/360 - Likewise, for the 2nd fraction, since 8 × 45 = 360,
20/8 = 20 × 45/8 × 45 = 900/360 - Subtract the two like fractions:
320/360 - 900/360 = 320 - 900/360 = -580/360 - After reducing the fraction, the answer is -29/18
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