Explanation

Find the number of TV sets sold by Store R:

Table: 40 in stock
Graph: 50% sold

50% of 40 = \(0.50 \times 40 = 20\)

Find the number of TV sets sold by Store T:

Table: 50 in stock
Graph: 90% sold
90% of 50 = \(0.90 \times 50 = 45\)

Use the percent change formula to find the approximate percent decrease:

Percent change = decrease \div original number \times 100

\((45 - 20) \div 45 \times 100 = 25 \div 45 \times 100 = 0.555 \times 100 = 55.5%\)

Hence option B is correct.
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Sandy
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