Ella said she could write a decimal percent as a decimal by moving the decimal point 2 places to the left and deleting the percent sign. is she correct? how do you know?

She is correct

Step-by-step explanation:

Remember that a percent is out of 100 so for example, take 0.5%

0.5%= 0.5/100= 0.005

Now to see if it will work the other way around:

0.005 * 100 = 0.5

This also works with whole numbers.

She is  correct.

Step-by-step explanation:

When  dividing  a decimal percent by  100 , the decimal point moves  2 place(s) to the  left.

walter needs to make at least 5 more cookies but no more than 40. 5 ≥ x ≥ 40;

step-by-step explanation:

walter has to make a minimum of 20 cookies. he already has 15 cookies made, so he must make 5 more to meet the minimum.

the maximum amount of cookies he can make is 55. he already has 15, so he has to make no more than 40 more cookies to meet the maximum.