Of​ these, 89.7 % were minor tremors with magnitudes of 4.9 or less on the Richter scale. How many minor earthquakes occurred in the country in the last​ year?

Question

In the last​ year, a total of

13 comma 84713,847

earthquakes occurred in a country. Of​ these,

89.7 %89.7%

were minor tremors with magnitudes of 4.9 or less on the Richter scale. How many minor earthquakes occurred in the country in the last​ year?

Answer 1

89.7% means you need to multiply by 89.7 and divide by 100 (or simplified multiply by 0.897)

Therefore 13,847 * 0.897 is the number of minor quakes (12,421 ; rounded up)