Fractions need common denominator to add or subtract them because without denominators a fraction is not a fraction, it is a whole number
Example - 2/8 is a fraction
but 2 is not a fraction
They are equal because of you simplify 80/100 by dividing by 10 u get 8/10
The answer would be about 5.8
At least 3. Have a nice day! :)
