Given:
Original level of cholesterol = 300
Cholesterol level reduced by 13% .
To find:
His present cholesterol level.
Solution:
According to the question,
Present cholesterol level = Present cholesterol level - 13% of Original level
![\text{Present cholesterol level}=300-(13)/(100)* 300](https://img.qammunity.org/2021/formulas/mathematics/high-school/61xv9wcmheu8rwxfzbtfcmoggdg3rhbe2j.png)
![\text{Present cholesterol level}=300-39](https://img.qammunity.org/2021/formulas/mathematics/high-school/gdubbmy6aniyr76w5bh7y8ou00vfwzyil5.png)
![\text{Present cholesterol level}=261](https://img.qammunity.org/2021/formulas/mathematics/high-school/jrmlp0mpar21zbpewp8xo7lqwhow2z9w9v.png)
Therefore, the present cholesterol level of Brian is 300.