Question

Solve using an equation or a proportion:

85% of k is 68. What is k?

Answer 1

85/100=68/k then cross multiply then solve.

Answer 2

You can view "85%" as: \[\frac{ 85 }{ 100 }k\]
or: \[0.85k\]
I will work with the first one, we will traduce the problem into a mathematical equation wich can help us to solve it using the axioms and algebraic propeties that you were taught in your classes.
\[\frac{ 85 }{ 100 }k=68\]
So, solving:
\[85k=6800\]
\[k=\frac{ 6800 }{ 85 }\]
if you do 6800/85, you'll get the result.

Answer 3

so k=80

Answer 4

Thank you @Crichards9100