Let x be the number of game he can finish in 1 hour
1/4 = 1/3 hour
x = 1 hour
cross-multiply
1/3 x = 1/4
Multiply both-side of the equation by 3
x = 3/4 of his level game
He can finish 3/4 of his level game in an hour
1.6m questions
2.0m answers