###Human: Yvonne brings a box of chocolates to school. Half have nuts and half do not. The students eat 80% of the ones with nuts and eat half of the ones without nuts. If there are 28 chocolates left, how many chocolates were in the box?, ### Assistant: The ones with nuts that they ate was 40% of the box because 80% x .5 = 40%
The ones without nuts that they ate equaled 25% of the box because 50% x .5 = 25%
They ate 65% of the box because 40 + 25 = 65
They left 35% of the box because 100 - 65 = 35
The box had 80 chocolates because 28 / .35 = 80 
 So the answer is :  80