Question 158858
If they win 1/2 their games from now on they must lose one for every one they win.
Formula: wins/total games=%
let w=number of wins > 15
(15+w)/(20+2w)=.6
15+w=.6(20+2w) Multiply each side by 20+2w to eliminate the fraction.
15+w=12+1.2w
.2w=3
w=3/.2
=15
So they have to play 15*2=30 more games to have a 60% record.
.
Check:
(15+15)/(20+30)
=30/50
=.6
.
Ed