The Answer of Whats 20 of 40 is 8
Quick Answer:- 20% of 40 = 8
To find 20% of 40, we can use the concept of percentage calculator. The term “percent” means “per hundred” or “out of 100.” So, when we say “20%,” it is the same as saying “20 out of 100.”
To calculate 20% of 40, we use the following formula:
Percentage value = (Percentage / 100) * Total Value
Where:
Percentage is the percentage we want to find (in this case, 20%)
Total Value is the whole value we are taking a percentage of (in this case, 40)
Now, let’s plug in the values and calculate:
Percentage value = (20 / 100) * 40
Step 1: Convert the percentage to a decimal by dividing it by 100.
Percentage value = 0.20 * 40
Step 2: Multiply the decimal value by the total value.
Percentage value = 8
Therefore, 20% of 40 is 8.
Now, let’s explore a couple of different approaches to solving this problem.
Approach 1: Using Proportions
We can use proportions to find the percentage. Since “20%” is equivalent to “20 out of 100,” we can set up a proportion:
20/100 = x/40
Here, “x” represents the percentage we want to find. Cross-multiplying and solving for “x” gives us:
x = (20 * 40) / 100
x = 800 / 100
x = 8
Approach 2: Mental Calculation
For mental calculation, we can recognize that finding 20% of a number is the same as finding 10% of the number and then doubling that result. To find 10% of 40, we simply move the decimal point one place to the left: 40 * 0.1 = 4. Then, to find 20%, we double this result: 4 * 2 = 8.
These approaches all lead us to the same answer: 20% of 40 is 8.
In conclusion, when you encounter a problem like “what’s 20% of 40,” you can use the formula, proportions, or mental calculation to arrive at the solution. It is essential to understand the concept of percentages to apply it effectively in various mathematical scenarios.