Question

if patrick can paint a wall in 40 minutes, what part of it can he paint in 1/2 hour?

1/4
1/2
2/3
3/4
4/5

Answer 1

1 wall is 40 minutes.
1/2 hour is equal to 30 minutes

Set up a ratio

1 wall/ 40 minutes = x wall/ 30 minutes

x wall= (1*30)/40

wall = 3/4