We are given the record sales of varous types.
67 million records were sold.
We are asked to find out how many more Pop/Rock records than Soul records were sold in the year?
From the given information we see that
Pop/Rock records = 56%
Let's find out 56% of 67 million

Sour records = 17%
Let's find out 17% of 67 million

Now find the difference between Pop/Rock records and Soul records

Therefore, about 26.1 million more Pop/Rock rethan Soul records were sold in the year