Subtract 28/80 from 40/90
40/90 - 28/80 is 17/180.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 90 × 8 = 720,
40/90 = 40 × 8/90 × 8 = 320/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
28/80 = 28 × 9/80 × 9 = 252/720 - Subtract the two like fractions:
320/720 - 252/720 = 320 - 252/720 = 68/720 - After reducing the fraction, the answer is 17/180
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