Question

a kirby vacuum cleaner dealer ship sold 4300 units in 2006 and 407 units in 2007. find the percent increase or decrease in the number of units sold.

Answer 1

Hint: 4300 + 470 = 8370 total units sold
2nd Hint:

\[\% \Delta = \frac{|a - b|}{a} \times 100\]

a = first number
b = second number