Question

10 burgers cost $60. What will 15 burgers cost?

Answer 1

60/10=6 dollars/burger
6x15=90 dollars/15 bugers

Answer 2

To get the answer we can first divide 60 by 2 to see how much cost 5 burgers. Then we have to multiply that result times 3 to get the answer.
60:2=30$ ----- 5 burgers.
30$*3=90$ - its the answer