Answer:
30%
Explanation:
Given that,
In year 1:
Dave's Deli sales = $1,000
Bertha's Burgers sales = $1,500
In year 2:
Dave's Deli sales = $1,300
Bertha's Burgers sales = $1,800
Therefore,
percentage change in sales for Dave:
= [(Change in sales) ÷ sales in year 1] × 100
= [($1,300 - $1,000) ÷ $1,000] × 100
= ($300 ÷ $1,000) × 100
= 0.3 × 100
= 30%
Therefore, the Dave's sales increases by 30%.