Percent of change

Today we worked on finding the percent of change. The formula is change/ original= %/ 100.

So if we have the following:
Original= 10
After =2

we would set up the following proportion:

8/10 = x/100
Solving would show that 800= 10x
Divide both sides by 10 to get 80 = x

And that's that. It's really pretty simple. Just remember that the top number is found by subtracting. It's not in the problem at all.

Homework is p. 363 (6-11) and finish the project 2B which is due tomorrow.

Thanks
Ms V