Jonas has been saving for a video game. last year it cost $28. this year it cost $36. find the percent of change in the cost. round to the nearest whole percent if necessary.

The 'percent of change' is just a fancy way of saying find the factor by which it changed (then just move the decimal two places). So, to find the factor, you just divide the two:



Since it's a percent, move the decimal two places, and you get: 77.77%, rounded to the nearest whole percent is 78%. This means that the cost went up by 78%.

The correct answer is addition