200% is the change from 81 to 243
Calculation steps:
[( 243 - 81 ) ÷ 81] x 100 = 200%
Formula
Percentage change = [(243 - 81) / 81] x 100
Subtract the new number by the original number
243 - 81 = 162
162 ÷ 81 = 2
2 x 100 = 200%
Example