Subtract 10/80 from 70/9, Solve 7 7/9

Subtract 10/80 from 70/9

1^st number: 7 7/9, 2^nd number: 10/80

70/9 - 10/80 is 551/72.

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,
70/9 = 70 × 80/9 × 80 = 5600/720
Likewise, for the 2nd fraction, since 80 × 9 = 720,
10/80 = 10 × 9/80 × 9 = 90/720
Subtract the two like fractions:
5600/720 - 90/720 = 5600 - 90/720 = 5510/720
After reducing the fraction, the answer is 551/72
In mixed form: 747/72

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