If she earns $24 in 2 hours, then the amount that she aerns per hour is
24/2 = $12
If she earns $108 in 9 hours, then the amount that she aerns per hour is
108/9 = $12
Thus, she earns $12 per hour. Thus, the number of hours it will take her to earn $750 is
750/12 = 62.5 hours
It will take her 62.5 hours t earn $750