Question 5803
let x = the number of games they must win to hit the 75% mark:
the number of games won/total games = %/100%
{{{x/20=75/100}}}
then cross multiply:
100x=1500
divide both sides by 100
x=15
they must win 15 games, and they have already won 9, so they must win an additional 6 more.