After the division, we get 8.99031476998. This rounds to <u>9</u> as a whole number, which is the answer.
When rounding to a whole number, the digits following the decimal decide what number it rounds to. If it is 0-4 it rounds to whatever the whole number currently is E.G.
8.1 would round to 8
But if its 5-9 it rounds to one above, like in our current case.
8.5 rounds to 9.
42.414 rounds to 42.
42.94149124 rounds to 43.
Go here - http://www.purplemath.com/modules/rtnldefs2.htm
First place is x. 2nd place is x - 50 (call that y) 3rd place is 2nd place (y) - 50
Reading through the problem we have "20 is", that's
"20 equals", "what percent", "x/100", "of 16", times 16.
So we have the equation 20 = x/100 · 16.
So cross-canceling the 16 and 100 to 4 and 25, we have 20 = 4x/25.
Multiply both sides by 25 to get rid of the
fraction and we have 500 = 4x so 125 = x.
Remember the =question is asking for "what percent"
so we should write our answer as 125%.
Finally, check to see if the answer makes sense.
Does "20 is 125% of 16" make sense?
