It depends on what you are trying to calculate but the most common way I go to find percentage is to multiply by the number in decimal for ie. 50% = .5.
If you are looking for a way to do it quickly in your head I always take find out what 10% is like in the case of 100 it would be 10 so if I want to find 15% I know I can find 10% and if I cut what 10% is in half I will find 5% so likewise if I add what 10%+5% I will end up with 15%. For example, 10% of 100 is 10 half of 10 is 5 and 10+5 equals 15. If you need to find something like 20% or 30% I know that I can find 10% and instead of dividing(cutting it in half) I can multiply by 2 or 3. 10% + 10% =20%
I hope it helps, if you have more questions let me know!
First, it is to be understood that logarithms allow a person to subject a number as an exponent of a base. As an example of ways in which logarithm is used to aid us in difficult calculations is when we calculate for the pH of a substance which has a formula of,
pH = -log[H+]
The required inequality is: x≤7
Step-by-step explanation:
The words have to be considered and observed properly to write an inequality.
At most means, that the value cannot exceed 7.
So,
Let x be a number
Then
A number is at most 7 will be written as:
as the value of x cannot exceed 7.
The required inequality is: x≤7
Keywords: Inequality, Variables
Learn more about inequalities at:
#LearnwithBrainly
Since the number ranges between 3 and 10, an equation can't be made because the number is always unknown or can be different every time
Answer:
w = 99
Step-by-step explanation:
45 = w - 54
99 = w
<em>good luck, i hope this helps :)</em>
