Step-by-step explanation: 77 is the correct answer because the price increased by 77 because 77 is the difference between the two, and how i got 77 was to subtract 140 ( the earlier price) from 217 ( the price that it changed to), i hope you found this helpful...
You have an over all number of 35 students. And 16 of them are me, so all u do is put the sixteen over the thirty-five. If you were doing it to find out how many girls there were you would minus the 16 from the 35 and make a fraction like so: