270.37% is the change from 81 to 300
Calculation steps:
[( 300 - 81 ) ÷ 81] x 100 = 270.37%
Formula
Percentage change = [(300 - 81) / 81] x 100
Subtract the new number by the original number
300 - 81 = 219
219 ÷ 81 = 2.7037037037037037
2.7037037037037037 x 100 = 270.37%