 
<translate> 60% na dalibai suna biyan abincin rana saboda 100 - 40 = 60. Dalibai 30 sun biya abincin rana domin 50 x.6 = 30. Wadannan dalibai suna biyan $7 don abincin rana domin 210 / 30 = 7. Amsar ƙarshe: 7. <eng> 60% of the students pay for the lunch because 100 - 40 = 60. 30 students pay for lunch because 50 x .6 = 30. These students pay $7 for their lunch because 210 / 30 = 7. The final answer: 7. 