Twenty-two is what percent of 55?
a.
22%
b.
40%
c.
250%
d.
50%

To find the percentage
that 22 is for the actual number 55 = (22/55) * 100
                                                        = (2/5) * 100
                                                        = 2 * 20
                                                        = 40 percent
So the correct option among all the options given in the question is option "B". Most of the information’s that are required for solving this problem is already given in the question. I hope the procedure for solving the problem is also clear for you to understand. In future you can always use this method for solving similar problems.
 

It would be 18 cm