Sometimes we are given statements like

20% of 10

      or

80% of 400

 

But what does that mean?

14.jpg

Here, 10 is the total value

& we have to find 20% of it

 

How do we find it?

We replace ‘of’ with ×

20%  of 10 = 20% × 10

          = 20/100 × 10

  = 2/10 × 10

  = 2

 

Similarly,

80%  of 400 = 80% × 400

     = 80/100 × 400

     = 80/1 × 4

                     = 320

 

How do we find it?

 

We replace ‘of’ with ×

20%  of 10 = 20% × 10

  = 20/100 × 10

  = 2/10 × 10

 = 2

 

Similarly,

80%  of 400 = 80% × 400

                    = 80/100 × 400

                    = 80/1 × 4

                    = 320

 

  1. Chapter 8 Class 7 Comparing Quantities
  2. Concept wise
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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 8 years. He provides courses for Maths and Science at Teachoo. You can check his NCERT Solutions from Class 6 to 12.