 
 <prompt> Mo dey buy valentine's day cards for di class. Dem get 30 students and e wan give Valentine to 60% of dem. Dem dey cost $2 each. If e get $40, wetin be di percentage of im money wey e go spend on Valentine? <response>: ```E need 18 valentine's cards because 30 x .6 = 18
E go spend $36 on top dis ones because 18 x 2 = 36
The proportion of im income wey e spend na .9 because 36 / 40 = .9
Dis na 90% of im income because .9 x 100 = 90

Answer na 90.``` 