Question

75% of asteroids are carbon asteroids. There are 375000 carbon asteroids in the field, now any are not carbon.

Answer 1

Step 1

Given that

`75\text{\% of asteroids are carbon asteroids and that there are 375000 carbon asteriods}`

Required; To find how many are not carbon

Step 2

Use ratio to solve the problem and take x to be the total asteroids

`\begin{gathered} \frac{75\text{\%}}{100\text{\%}}\text{=}\frac{\text{375000}^{}}{x} \\ 75x=375000*100 \\ x=(37500000)/(75) \\ x=500000 \end{gathered}`

Hence if there are 500000 asteroids and 375000 are carbon asteroids, then the number that is not carbon is;