Answer:
399 mattresses
Explanation:
Total number of mattresses sold : 1330
Percentage of King size mattresses sold = 30%
Number of King size mattresses = ?
This can be calculated as
30% of 1330 = Number of King size mattresses
( 30 × 100) × 1330
= 399 mattresses.
The Number of King size mattresses sold = 399 mattresses