Question

Laura checked her outdoor thermometer and noticed that the temperature rose from 31 degrees in the morning to 45 degrees in the afternoon. What is the approximate percent increase for the day so far?
The percent increase is 31%.
The percent increase is 45%.
The percent increase is 68%.
The percent increase is 82%.

Answer 1

What is the increase?

Answer that and the Percent Increase may be more clear.

Note: Don't post problems wit NONE of your own work showing.

Answer 2

1) find the difference between your two numbers
2) DIVIDE that difference [the number you get in part a] by the first number (for you that is 31)
3) MULTIPLY that answer by 100
:)

Answer 3

So for you
1) 45-31 = ?

Answer 4

so is the awswer 45%

Answer 5

Yes!! good job!

Answer 6

thanks!

Answer 7

No problem :) good job.

Answer 8

Except for the "multiply by 100". I really don't know why textbooks say that.

0.45 = 45%

There is no "multiply by 100" going on in there.

If you multiply it by 100, you get 0.45 * 100 = 45 = 4500% -- That's not right.

Answer 9

haha I think it's so that you get 45.0
which just makes more sense because then one would write 45%
instead of 0.45%
I don't think anyone this level of math will be thinking it through that much ;)

Answer 10

But you are absolutely right.