Percentage of Whole Numbers Quiz/Game
This game will help you practice finding the percentage of a number, where all the numbers involved are multiples of 10. For example, 70% of 50. If the given answer is wrong, the game will give the correct solution.
 
The most common way to find the percentage of a number is to change the percentage into a decimal or a fraction and then multiply. However, when the numbers involved are multiple of 10, the calculation often becomes much simpler, allowing you to solve it mentally using a shortcut. Scroll down the page for a detailed explanation.
 

Percent of a Number

Calculate the value based on the percentage.

Enable 60-Second Timer

Start Game

Score: 0 / 0

Time: 60

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How to Play the Percentage of Whole Numbers Game
The game will challenge you to solve percentage of whole numbers.
Here’s how to play:

1. Timed Option: Check the timer if you want to enable the 60 second timer. Click “Start Game”.
   
2. Look at the Problem: You’ll be given a percentage of whole number problem. Solve the problem.
   
3. Enter Your Answer: Enter in the result.
   
4. Check Your Work: Click the Check button (or press the Enter key). The game will tell you if you’re correct. If you are wrong, you will be shown the correct answer.
   
5. Get a New Problem: Click the Next button for a new problem.
   Your score is tracked at the top, showing how many you’ve gotten right out of the total you’ve tried.
   
6. Back to Menu Click “Back to Menu” to restart the game.
    
   

How to find the percentage of whole numbers
The Shortcut Method
The method relies on converting the percentage to a fraction, but the multiplication step is simplified.
 
Let’s use the example: What is 30% of 50?
Step 1: Convert the Percentage to a Fraction
30% = 30/100
Step 2: Use Simplified Multiplication to multiply the numerator.
The multiplication is 30 × 50. Since both numbers end in zero, you can use a trick:

1. Ignore the Zeros: Multiply the non-zero digits:
   3 × 5 = 15
   
2. Add the zeros to the end of the number.
   15 → 1500
   Step 3: Divide by the denominator.
   Divide by 100 by moving the decimal 2 places to the left.
   1500 → 15
   So, 30% of 50 = 15.
    
   

This video gives a clear, step-by-step approach to solve percentage of whole numbers.

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