**Introduction:**

You can display percent in several ways, such as 0.01 or 0.1 and also in fractional form.

You have heard the word percent on a broader level. In this session, you will learn how to find the **whole** quantity when **a part** and **a percent** is given.

To determine totals from a percent in the future, multiply the given percentage value by 100 and divide that product by the percent. This method works in any instance where a percentage and its value are given.

We can use this equation to find the unknown value,

PartWhole= Percent100PartWhole= Percent100

**Double line diagram**

Using Equation

Let’s use a double line diagram and Equation to find the Unknown Whole.

**Method 1: Double line diagram**

**Example 1: **Joe scores 104 marks in his entrance test, which is 80% of total marks. Find the total marks.

104 ÷8 = 13

So, 13 × 10 = 130

Therefore, 80% of 130 is 104.

**Method 2: Use Equation**

**Example 1: **You spent $10 or 20% of your pocket money in the first three days of the month. Find the total pocket money you got.

**Solution:** Here we have, part = $10, percent = 20%, whole = ?

Now, using the equation,

**Example2: **Jose got 8 questions right on his test. If his grade was 80%, how many questions were on the test?

**Solution:** Here we have, part = 8 questions, percent = 80%, whole =?

Now, using the equation,

**More Word Problems: Understand Percent**

**Example: **Two of the pets at the pet store are birds. If it is 10% of the pets at the store. How many pets are at the store?

**Solution: **

Here we have, part = 2, percent = 10%

Whole =?

Using an equation,

**Concept Map:**

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