16 = n% x 80
16 = .8n (since you can't move the decimal 2 places back on n%, move the decimal point two places back on the number you are multiplying n% by.
Look at this sample to see that it works: .83 x 17 = 83 x.17
16 = .8 n
.8 .8 divide both sides by .8
Answer is 20%. $16 is 20% of $80.
