Answer: 80
Explanation: To answer the question 28 is 35% off what number, we translate the question into an equation.
So we have "28 is" which means 28 = 35% which we need to write as a decimal. To write a percent as a decimal, we move the decimal point 2 places to the left so 35% can be written as the decimal .35. Next we have "of what number" which means times X.
Now we have the following equation.
28 = (.35) (x)
Now to solve for x since x is being multiplied by .35, we need to divide by .35 on both sides of the equation.
On the right side of the equation, the .35's cancel and we have x. On the left side of the equation, we have 28 ÷ .35 which is 80.
So 80 = x.
Therefore, 28 is 35% of 80.