Answer:
Well we can take this word for word into an expression
thirty percent of which is basically
0.3 *
We have an unknown number (what number) lets make that unknown number x
0.3 * x
And we want to know what is 13.5 which basically means equal 13.5
0.3 * x = 13.5
We solve for x
Solve from here.
I’m gonna multiply 10 on both sides
3 * x = 135
Now solve
x = 45