By how many times has the number of passengers using the world's airports each year increased since 1972?
A) 17-fold
B) 27-fold
C) 37-fold
D) 47-fold

Question

Quizplus · Accepted Answer

According to the passage, the number of passengers using the world's airports has increased from 310 million in 1972 to 11.6 billion in 2018. To find the increase in terms of folds, we need to divide 11.6 billion by 310 million, which gives us approximately 37.4. Therefore, the number of passengers has increased 37-fold since 1972, which makes choice C the correct answer.

By How Many Times Has the Number of Passengers Using