Lee finishes 2/3 of her homework in 3/4 hours. how long will it take her to finish all of her homework?

Answer 1

2/3 of homework in 3/4 hours,
1/3 of homework in 3/8 hours
3/3 of homework in 9/8 hours

or

x hours/(3/4)hours = all homework/( 2/3 of homework)
x/ (3/4) = 1/ (2/3)
2/3 x = 3/4
x = (3/4)/(2/3) = 9/8

or

2/3 homework : 3/4 hours = 1 homework : x hours
2/3 : 3/4 = 1 : x
2/3 x = 3/4
etc, same as above

Answer 2

9/8