Question

Assume that in October of a particular year about 215 billion text messages were sent or received in the US, and the prediction is that in the next month it will be a 13% increase. About how many will be sent or received in November of the same year? Rounded to the nearest tenth of a billion.

Answer 1

There will be
`243` billion messages sent or received in November.

Explanation:

Given.

Number of text messages sent or received
`=215` billion.

Increment on the very next month
`=13\%=(13)/(100)=0.13`

Lets find what is
`13\%\ of\ 215`

⇒
`13\%\ of\ 215`

⇒
`0.13* 215=27.95`

So we will add this value to our previous months data.

Now

Number of text messages sent in the month of November
`=(27.5+215)=242.95` billion.

Rounding to the nearest tenth the answer will be
`243` billion.

So
`243` billion text messages were sent or received in November.