Subtract 84/80 from 8/18, Solve 8/18

Subtract 84/80 from 8/18

1^st number: 8/18, 2^nd number: 1 4/80

8/18 - 84/80 is -109/180.

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,
8/18 = 8 × 40/18 × 40 = 320/720
Likewise, for the 2nd fraction, since 80 × 9 = 720,
84/80 = 84 × 9/80 × 9 = 756/720
Subtract the two like fractions:
320/720 - 756/720 = 320 - 756/720 = -436/720
After reducing the fraction, the answer is -109/180

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