Subtract 24/18 from 20/80, Solve 20/80

Subtract 24/18 from 20/80

1^st number: 20/80, 2^nd number: 1 6/18

20/80 - 24/18 is -13/12.

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

Next, find the equivalent fraction of both fractional numbers with denominator 720
For the 1st fraction, since 80 × 9 = 720,
20/80 = 20 × 9/80 × 9 = 180/720
Likewise, for the 2nd fraction, since 18 × 40 = 720,
24/18 = 24 × 40/18 × 40 = 960/720
Subtract the two like fractions:
180/720 - 960/720 = 180 - 960/720 = -780/720
After reducing the fraction, the answer is -13/12

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