Question

How do you set this up?

Answer 1

b percent of something (x)
means: b/100 * x

ex: (2)
20% of 120 = 20/100*120 = 24

ex: (4)
18 = 40 % of x
means: 40*x/100 = 18
x=45


and so on


hope that helps

If you still need help, just let me know!