# James types 84 words in 2 minutes. He estimates that his history essay is 420 words long. What is the least amount of time James will need to type his essay?

Mar 28, 2018

$\text{10 min}$

#### Explanation:

$\text{84 words = 2 minutes}$

So

$\text{42 words = 1 minute}$

Then

$\text{420 words" xx ("1 min")/("42 words") ="10 minutes}$

Mar 28, 2018

$10$ minutes.

#### Explanation:

If James can write $84$ words in $2$ minutes, then he writes $\frac{84}{2}$ words/minute, or $42$. Since $420$ is $42 \times 10$, he can write $420$ words in $10$ minutes.