Subtract 45/15 from 9/80, Solve 9/80

Subtract 45/15 from 9/80

1^st number: 9/80, 2^nd number: 3 0/15

9/80 - 45/15 is -231/80.

Find the least common denominator or LCM of the two denominators:
LCM of 80 and 15 is 240

Next, find the equivalent fraction of both fractional numbers with denominator 240
For the 1st fraction, since 80 × 3 = 240,
9/80 = 9 × 3/80 × 3 = 27/240
Likewise, for the 2nd fraction, since 15 × 16 = 240,
45/15 = 45 × 16/15 × 16 = 720/240
Subtract the two like fractions:
27/240 - 720/240 = 27 - 720/240 = -693/240
After reducing the fraction, the answer is -231/80

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