Reading - 44
Sports - 55
Video games - 55
Music - 66
--------------------------
= 220
Reading = (44/220) x 100 = 20%
Sports = (55/220) x 100 = 25%
Video games -> same as sports
Music = (66/220) x 100 = 30%
20 + 25 + 25 + 30 = 100%
hope this helps :)
plz let me know if this was not your question