Question

write and solve a proportion to answer the question.
36 is 0.9% of what number w ?
$square = \frac{0.9}{100}$
$w = square$

Explanation:

Step1: Set up the proportion

$\frac{36}{w} = \frac{0.9}{100}$

Step2: Cross-multiply to solve for $w$

$0.9w = 36 \times 100$

Step3: Calculate right-hand side value

$0.9w = 3600$

Step4: Isolate $w$ by division

$w = \frac{3600}{0.9}$

Answer:

$w = 4000$