Gwen had saved up to 776 dimes and decided to spend them on on sodas. If it costs 42 dimes for each soda from a soda machine how many more time would she need to buy the final soda?

You would need 22 more dimes to buy the final soda.

776 / 42 = 18.476

42 x 18 = 756

776 - 756 = 20

20 + 22 = 42

if you have 20 dimes left over, you need 22 more to buy one final soda from the macine.