Todd took a math quiz last weak. there were 85 problems on the quiz and todd answered 20% of them correctly. how many problems did todd get correct?

85 x .20 = 17 

or 

20% = 20/100 = 2/10 =1/5 
85 x 1/5 = 17 

He got 17 problems correct. 

I showed you two different ways to get the same answer one with a fraction and one with a decimal. I think doing percentages as decimals is easier but thats just me. 

Well if there are 85 questions and 20% of them are correct, basically 20% means 20/100 which when reduced is equivalent to 1/5. so then you would take 85 and multiply it by 1/5 to get 17. He got 17 questions correct

There is 240 red cars and there is 400 blue cars because 240/3=80 and 80*5=400

8,400-6,400=xx/6,400anyways the percent increase is 31.25% or 0.3125 you can round if you can