Question

Suppose the total number of earthquakes with a magnitude of 4 or higher averages 14500 per year. Approximately how many are magnitude 5 or higher

Answer 1

4 or higher = 90%
5 or higher = 10%

90% = 14,500
10% = ?

14,500 ÷ 10 = 1,450

90% = 14,500
10% = 1,45