Complete the frequency table:

Method of Travel to School
Walk/Bike. Bus Car Row totals
Under age 15 : 60 165
Age 15 and above: 65 195
Column totals : 152 110 98 360

What is the joint relative frequency percentage for students under age 15 who walk/bike to school? Round to the nearest whole percentage.
A:24%
B:65%
C:73%
D:87%