Fraction Problem: Calculate Total Storks When 2/3 Have Black Spots

An bird watcher observes some wild storks.

He notes that $\frac{2}{3}$ of them have a black spot on their wings, while 130 of them do not.

How many storks does the bird watcher observe?

To solve this problem, we'll execute the following steps:

• Step 1: Define the variable for total stork count
• Step 2: Express the condition using equations
• Step 3: Solve the equation for the variable

Now, let's work through each step:

Step 1: Define $x$ as the total number of storks observed.

Step 2: According to the problem, $\frac{2}{3}x$ have a black spot, meaning $\frac{1}{3}x$ do not have a black spot. We know $\frac{1}{3}x = 130$.

Step 3: Solve the equation for $x$:
Dividing both sides by $\frac{1}{3}$ gives: $\frac{1}{3}x = 130$
$x = 130 \times 3$
$x = 390$.

Therefore, the total number of storks observed is $390$.