Question

If 90% of a number is 450 what is the 30% of number

Answer 1

Let the number be a

According to question

90 % of a = 450

=> 90a/100 = 450

=> 9a /10 = 450

=> a = 450 × 10 / 9

=> a = 50 × 10

=> a = 500

Now,

30 % of 500 = 30 × 500 / 100

= 30 × 5

= 150

Answer 2

Hi,

Here is your answer,

1st part of the question,

Let us consider the number be x

→ 90 × x → 450

→ 90x /100→ 450

→ 9x/10 → 450

→ x → 450×10/9

→ x → 50×10

 → a → 500
 
2nd part of the question,

 → 30×500/100 ( By Cancellation)

 → 30×5

→ 150