Respuesta :
The present cholesterol level of Brian is 256
Solution:
Given that, Brian has reduced his cholesterol level by 20% after his last check up.
His original level was 320
We have to find what is his cholesterol level now?
The present cholestrol level is given as:
present cholesterol level = previous cholesterol level – change percentage x previous cholesterol level
So, present cholesterol level = 320 – 20% of 320
20% can be written in fraction as [tex]\frac{20}{100}[/tex]
[tex]\text { Present cholesterol level }=320-\frac{20}{100} \times 320[/tex]
[tex]\begin{array}{l}{=320-\frac{1}{5} \times 320} \\\\ {=320-64=256}\end{array}[/tex]
Hence, at present cholesterol level is 256
