**Contents:**

- How to Calculate Percentages with a Calculator
- How to Calculate Percentages with Google
- How to Calculate Percentages by Hand

Watch the video for a couple of quick examples by hand and with the % button on a calculator:

## How to Calculate Percentages with a Calculator

### 1. If your calculator has a “%” button.

Let’s say you wanted to find 19 percent of 20. Press these buttons:

1 9 % * 2 0 =

The answer is 3.8.

### 2. If your calculator does **not **have a “%” button

Step 1: Remove the percent sign and add a couple of zeros after the decimal point.

19% becomes 19.00

Step 2: Convert the percent to a decimal by moving the decimal point two places to the left:

19.00 > .1900

Step 3: Press these buttons:

. 1 9 * 2 0 =

### A different type of question

**19 is what percentage of 20?**

Step 1: Rewrite the question as a fraction. “19 out of 20” becomes:

19/20.

Step 2: Multiply Step 1 by 100:

(19/20) * 100 = 95

### How to Calculate Percentages with Google

Did you know Google has a built in calculator? In other words, you can use the Google search feature to type in a question and the answer will pop up on a calculator. You *could* type it in just like you would on a calculator:

“19%*20”

**OR**

*Google is very intuitive and will also give you a result if you just type “19% of 20” or even “19 percent of 20”!
*

## How to Calculate Percentages by hand: Steps

**What is 19% of 20? **

Step 1: Remove the percent sign and add a couple of zeros after the decimal point.

19% becomes 19.00

Step 2: Convert the percent to a decimal by moving the decimal point two places to the left:

19.00 > .1900

Step 3: Multiply Step 2 by the amount (in this case, 20):

.19 * 20 = 3.8.

**19 is what percentage of 20?**

Step 1: Rewrite the question as a fraction. “19 out of 20” becomes:

19/20.

Step 2: Multiply Step 1 by 100:

(19/20) * 100 = 95

## References

Zegarelli , M. (2017). Basic Math & Pre-Algebra For Dummies. For Dummies Math & Science.