Question

1) 40% of a number is 800 then find the number?

A)800
B)8000
C)2000
D)200

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Answer 1

Answer:

Let the number be x

40% of x=800

800×100/40=80000/40

=2000 Ans

Answer 2

Given :

• 40% of a number is 800.

To Find :

• The certain number ?

Solution :

• Let us assume.

➣ The certain number be x.

Method 1.

According to the question :

➣ 40% of x = 800

➣ 40 × 0.01 × X = 800

➣ 0.4x = 800

➣ x = 800/0.4

➣ x = 2000

Method 2.

➣ x : 100% = 800 : 40%

➣ x/100% = 800/40%

➣ x = (800 × 100%)/40%

➣ x = 80000%/40%

➣ x = 2000

Hence,

• The certain number is 2000.