Subtract 90/80 from 15/9, Solve 1 6/9

Subtract 90/80 from 15/9

1^st number: 1 6/9, 2^nd number: 1 10/80

15/9 - 90/80 is 13/24.

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

Next, find the equivalent fraction of both fractional numbers with denominator 720
For the 1st fraction, since 9 × 80 = 720,
15/9 = 15 × 80/9 × 80 = 1200/720
Likewise, for the 2nd fraction, since 80 × 9 = 720,
90/80 = 90 × 9/80 × 9 = 810/720
Subtract the two like fractions:
1200/720 - 810/720 = 1200 - 810/720 = 390/720
After reducing the fraction, the answer is 13/24

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