ExplanationQuestion 7 Round the values and use the percent change formula to approximate the answer; ignore the millions, because they are in both numbers. The percent change formula is \(\frac{1}{3}*100\) so \(\frac{(18-12)}{12}*100 =50%\).
Hence option B is correctQuestion 8 The chart already ranks the countries in order in 1990. In 2001, the rankings were:
US—1st;
UK—2nd;
France—5th;
Germany—4th;
Japan—7th;
Brazil—6th;
China—3rd;
Spain—9th;
and Australia—8th.
Only three countries—France, Japan, and Spain—ranked lower in 2001 than they did in 1990, making the answer 3.
Hence 3 is the correct option
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