Since percents are suppose to be out of a hundred you can do it like a ratio:

117/100 = 55/n

55x100 = 117n

5500 = 117n

5500/117 = n =47.009

117/100 = 62/n

62x100 = 117n

6200 = 117n

6200/117 = n = 52.991

which is pretty much what the other person did, i just showed more steps.