Question

which is the most accurate way to estimate 21% of 47?
\\(\frac{2}{5} \times 45\\)
\\(\frac{1}{5} \times 45\\)
\\(\frac{1}{2} \times 46\\)
\\(\frac{3}{10} \times 50\\)

Explanation:

Step1: Analyze the percentage

$21\%$ is close to $\frac{1}{5}=20\%$.

Step2: Analyze the number

$47$ is close to $45$.

Answer:

$\frac{1}{5}\times45$