Subtract 24/80 from 9/90, Solve 9/90

Subtract 24/80 from 9/90

9/90 - 24/80 is -1/5.

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,
9/90 = 9 × 8/90 × 8 = 72/720
Likewise, for the 2nd fraction, since 80 × 9 = 720,
24/80 = 24 × 9/80 × 9 = 216/720
Subtract the two like fractions:
72/720 - 216/720 = 72 - 216/720 = -144/720
After reducing the fraction, the answer is -1/5

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