Using the Data in the Above Table,what Percentage Should Be

Using the data in the above table,what percentage should be reported in blank B of column 2?

A) 6
B) 16
C) 21
D) 25
The first step is to identify "C." C is the cumulative percentage of the previous class shown in column 3.It is found by adding the percentage in the relevant class (column 2) to the prior cumulative percentage (column 3) .C = 35 + 16 = 51.The blank in column 2 is then found by subtracting the cumulative percentage in column 3 for the entry $50,000-$74,999 from that in the previous class.B = 72 - 51 = 21.