Final answer:
To find the value of 'box' in the equation 5K/8 = box/40, we can cross-multiply and solve for the unknown variable, resulting in box = 25K.
Step-by-step explanation:
To solve the equation 5K/8 = box/40, we can cross-multiply and solve for the unknown variable. Cross-multiplying means multiplying the numerator of the first fraction by the denominator of the second fraction, and vice versa. In this case, it would be 5K * 40 = 8 * box. Simplifying this equation, we get 200K = 8 * box. To find the value of 'box', we can divide both sides of the equation by 8, resulting in box = 25K.
Learn more about Solving equations with unknown variables