A bag of candy contains 250 pieces, of which 24% are dark chocolate. How many pieces are NOT dark chocolate?

A. 60

B. 90

C. 150

D. 190

190 pieces are not dark chocolate

1. We assume, that the number 250 is 100% - because it's the output value of the task.

2. We assume, that x is the value we are looking for.

3. If 250 is 100%, so we can write it down as 250=100%.

4. We know, that x is 24% of the output value, so we can write it down as x=24%.

5. Now we have two simple equations:

1) 250=100%

2) x=24%

where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:

250/x=100%/24%

6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for what is 24% of 250

250/x=100/24

(250/x) * x = (100/24) * x - we multiply both sides of the equation by x

250=4.16666666667*x - we divide both sides of the equation by (4.16666666667) to get x

250/4.16666666667=x

60=x

x=60

now we have:

24% of 250=60