On the first day, 84,500 people visited a trade fair. On the 4th day, the number reduced to 16,900. By what percentage did the number of people reduce on the 4th day?

Correct option is A

Given:
Number of visitors on Day 1 = 84,500
Number of visitors on Day 4 = 16,900
Formula Used:
Percentage reduced = $$\frac{\text{Reduced Number of People}}{\text{ Original Number of People}} × 100$$​​
Solution:
Reduced number of people = 84,500 - 16,900 = 67,600
Percentage reduced = $$\frac{67,600 }{ 84,500} × 100$$​ = 80%