A family's phone plan charges $0.25 for every 4 texts. If the family sends 880 texts this month, which of the following represents the bill amount they will receive?

Question

Quizplus · Accepted Answer

This is a ratio/proportion problem. We have $0.25 for every four texts. So, how many much will it cost for 880 texts? We can write that as a proportion: 0.25: 4 :: x: 880 Step 1: Rewrite the proportion as a fraction. In order to prevent a decimal being in the numerator of the fraction, we're going to multiply both the numerator and denominator by 4 to get a whole number in the numerator: 0.25 (4) : 4 (4) = 1 : 16 = ¹/₁₆ ¹/₁₆ = ^x/₈₈₀ Step 2: Cross multiply. 1 * 880 = 16 * x Step 3: Simplify. 880 = 16 * x 880 ÷ 16 = x 55 = x

A Family's Phone Plan Charges $0