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1. The following table show the world production of steel in 1920 - 1927. Study the table and answer the questions.

Year Production (in million tons)

1920 71.30

1921 43.51

1922 67.66

1923 76.23

1924 77.23

1925 88.93

1926 91.75

1927 100.17

The difference of the production of steel in the year 1923 and 1924 is x% of 1927. Then the value of x approximately.

A. .1%

B. .01%

C. .001%

D. 1%

Solution:

\begin{aligned} According to the question, \\ \Rightarrow 100.17 \times \frac{x}{100} = (77.23 - 76.23) \\ \Rightarrow x = \frac{100}{100.17} \\ \Rightarrow x = 0.99860.. % \\ \Rightarrow x = .1 % (Approx) \end{aligned}

Year	Production (in million tons)
1920	71.30
1921	43.51
1922	67.66
1923	76.23
1924	77.23
1925	88.93
1926	91.75
1927	100.17

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