100% - 20% = 80%.
400 is 80% of what number?
Let n = the original price.
400 = 0.80n
400/0.80 = n
€500 = n
Understand?
But I hope someone answers u 2920
I'm going to assume that you know what an integer is, and that 1 is an integer. I'm also going to assume you've learned what a mixed number is. If not, a mixed number is a decimal changed into a fraction. So rather than write "1.5" as an answer, you can leave it as a fraction and get 1 1/2.
The same thing can be done to any type of rational fraction. 1.1, 1.2, 1.3, etc. If you choose to use any of those, the numerator will be the number you choose to do (1,2,3, etc) over 10.
I hope I was able to help. Best of luck!
Answer:
Step-by-step explanation:
By quotient property :
Given:
and 
To find 
Solution:
Applying quotient property:
To write 
as a single logarithm.
Solution:
Applying quotient property:
To expand 
Solution:
Applying quotient property:
