Subtract 80/90 from 50/80
50/80 - 80/90 is -19/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 90 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
50/80 = 50 × 9/80 × 9 = 450/720 - Likewise, for the 2nd fraction, since 90 × 8 = 720,
80/90 = 80 × 8/90 × 8 = 640/720 - Subtract the two like fractions:
450/720 - 640/720 = 450 - 640/720 = -190/720 - After reducing the fraction, the answer is -19/72
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