Step 1
Given that
[tex]75\text{\% of asteroids are carbon asteroids and that there are 375000 carbon asteriods}[/tex]Required; To find how many are not carbon
Step 2
Use ratio to solve the problem and take x to be the total asteroids
[tex]\begin{gathered} \frac{75\text{\%}}{100\text{\%}}\text{=}\frac{\text{375000}^{}}{x} \\ 75x=375000\times100 \\ x=\frac{37500000}{75} \\ x=500000 \end{gathered}[/tex]Hence if there are 500000 asteroids and 375000 are carbon asteroids, then the number that is not carbon is;
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