Question

Mobile users in India have gone up by 20\%20% in a year. There are 540540 million mobile users today. How many mobile users were there in India last year?

Answer 1

Answer: There were 450 million mobile users in India last year .

Step-by-step explanation:

Hi, the correct amount of users in the question is 540 million mobile users, not 540540 million.

So to solve this we have to write an equation

x 1.2 =540,000,000

Where:

• x = number of mobile users in India last year
• 1.2= 100 %( total) +20% (increase)= 120% , for the decimal form 120/100=1.2

So, this expression means that the number or mobile users last year (x) increased by 20% (1.2) is equal to 540 million.

Solving:

x =540,000,000/ 1.2= 450,000,000

There were 450 million mobile users in India last year

Answer 2

Answer:

432 million.

Step-by-step explanation:

We are given that,

Number of mobile users today = 540 million.

Increase in the number of users each year = 20%.

Let, the number of users last year = x million.

So, the number of users increase from the last year are '20% of 540 million' i.e. $0.2\times 540$ = 108 million.

Thus, the number of users in the last year = Number of user's today - Number of users increased.

i.e.  number of users in the last year = 540 - 108 = 432 million.

Hence, there were 432 million mobile users last year.