Subtract 9/18 from 7/80, Solve 7/80

Subtract 9/18 from 7/80

7/80 - 9/18 is -33/80.

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,
7/80 = 7 × 9/80 × 9 = 63/720
Likewise, for the 2nd fraction, since 18 × 40 = 720,
9/18 = 9 × 40/18 × 40 = 360/720
Subtract the two like fractions:
63/720 - 360/720 = 63 - 360/720 = -297/720
After reducing the fraction, the answer is -33/80

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