186.87% is the change from 99 to 284
Calculation steps:
[( 284 - 99 ) ÷ 99] x 100 = 186.87%
Formula
Percentage change = [(284 - 99) / 99] x 100
Subtract the new number by the original number
284 - 99 = 185
185 ÷ 99 = 1.8686868686868687
1.8686868686868687 x 100 = 186.87%