This year's sale was 19.5 million copies of a game.
For the next year, they expect a sales increase of 3%.
To determine how many copies they expect to sell, first, you have to calculate the 3% of this year's sales, to do so multiply 19.5 by 3 and divide it by 100
The 3% of the year's sales is 0.585 million
Next add the 3% to the total sales of this year to determine the expected sales for next year:
Next year they will sell 20.085 million copies