Answer:
The usual size of the container is 15 ounces.
Step-by-step explanation:
Consider the provided information.
A protein mix claims to contain a bonus of 20% more mix than the usual size container.
Let the usual size of the container was x ounces.
They increase 20% of usual size and the bonus size is 18 ounces.
Therefore, the new size should be:
[tex]x+20\%x=18[/tex]
[tex]x(1+0.20)=18[/tex] (∴20%=[tex]\frac{20}{100}[/tex]=0.20)
[tex]x(1.20)=18[/tex]
[tex]x=\frac{18}{1.20}[/tex]
[tex]x=15[/tex]
Hence, the usual size of the container is 15 ounces.