Step 1: Change the percentage to decimal by moving two decimal places to the left
For example, if we want to add 15% of 80 to it, we first change 15% to decimal.
Step 2: Multiply the decimal with the given base value
So, multiply 80 by 0.15.
Step 3: Add the value from Step 2 to the given base value
Hence, we add 12 and 80.
Examples of adding percentages using decimals
Q1) What would be the value if we increase 90 by 20%?
Let’s change 20% to decimal by moving two decimal places to the left:
This means that 20% is equal to 0.20 in decimal.
Now let’s multiply 0.20 to 90 to find what needs to be added to 90.
Once we find 20% of 90, we now add 18 to the base value – 90.
So, we have 108 if we increase 90 by 20%.