Subtract 75/9 from 3/80, Solve 3/80

Subtract 75/9 from 3/80

1^st number: 3/80, 2^nd number: 8 3/9

3/80 - 75/9 is -1991/240.

Find the least common denominator or LCM of the two denominators:
LCM of 80 and 9 is 720

Next, find the equivalent fraction of both fractional numbers with denominator 720
For the 1st fraction, since 80 × 9 = 720,
3/80 = 3 × 9/80 × 9 = 27/720
Likewise, for the 2nd fraction, since 9 × 80 = 720,
75/9 = 75 × 80/9 × 80 = 6000/720
Subtract the two like fractions:
27/720 - 6000/720 = 27 - 6000/720 = -5973/720
After reducing the fraction, the answer is -1991/240

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