You answer 12 out of 20 problems correct on your homework. What percent did you answer correct? What percent did you answer incorrect?
The answer to your question would be 60 percent all you do is divide that and move the decimal 2 places to the left.
Convert 12/20 into a percent to find how many were right.
12/20 = .6= 60% (multiply by 100 and add a percentage sign)
You also got 8/20 wrong
8/20 = .4 = 40%
So 60% correct and 40% incorrect,
Hope this helps.