150, I believe
"if 40% of a number is 60" (40/100) * x = 60 (.4) x = 60 [reduce or just write it this way] x = 60(.4) [multiply both sides by .40]
7/50 is in its simplest form because 7 is a prime number and it is not divisible by any number except 7 or 1
The range is 30. To find the range, you subtract the largest number, which is 100, by the smallest number, which is 70.
575.00= 100% 575 divided by 100= 5.75 times 25= 143.75 So then 575.00 - 143.75 = 431.25 (the discount was 143.75, and her new total would be 431.25)
