Subtract 28/80 from 2/18, Solve 2/18

Subtract 28/80 from 2/18

2/18 - 28/80 is -43/180.

Find the least common denominator or LCM of the two denominators:
LCM of 18 and 80 is 720

Next, find the equivalent fraction of both fractional numbers with denominator 720
For the 1st fraction, since 18 × 40 = 720,
2/18 = 2 × 40/18 × 40 = 80/720
Likewise, for the 2nd fraction, since 80 × 9 = 720,
28/80 = 28 × 9/80 × 9 = 252/720
Subtract the two like fractions:
80/720 - 252/720 = 80 - 252/720 = -172/720
After reducing the fraction, the answer is -43/180

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