Subtract 8/45 from 4/80, Solve 4/80

Subtract 8/45 from 4/80

4/80 - 8/45 is -23/180.

Find the least common denominator or LCM of the two denominators:
LCM of 80 and 45 is 720

Next, find the equivalent fraction of both fractional numbers with denominator 720
For the 1st fraction, since 80 × 9 = 720,
4/80 = 4 × 9/80 × 9 = 36/720
Likewise, for the 2nd fraction, since 45 × 16 = 720,
8/45 = 8 × 16/45 × 16 = 128/720
Subtract the two like fractions:
36/720 - 128/720 = 36 - 128/720 = -92/720
After reducing the fraction, the answer is -23/180

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