Hello
If Susan takes 300mg of a drug twice daily
![300mg](https://img.qammunity.org/2023/formulas/mathematics/college/tedwgwt6gk9e5ajz0trgasvxgiqe2kw4gs.png)
But she was given 75mg tab and takes the drug twice daily
Let's divide her daily dose by the numbers of time she takes it
![(300mg)/(2)=150mg](https://img.qammunity.org/2023/formulas/mathematics/college/dseybv44j4ob5a7ml4j703upz5chel0l57.png)
This implies she takes 150mg in the morning. To find the number of tablets that will amount to 150mg would be
![\begin{gathered} 1\text{tab}=75mg \\ \text{xtab}=150mg \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/hhml9jzrtkgpredm2pjsy5e8b6x6q2z2v9.png)
Cross multiply both sides and solve for x
![\begin{gathered} x*75=1*150 \\ 75x=150 \\ (75x)/(75)=(150)/(75) \\ x=2 \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/sep3iqhswe7g05hodp4rgu9mb636k18jsu.png)
From the calculations above, Susan has to take 2 tablets of her medication in the morning daily.