83.87% is the change from 155 to 285
Calculation steps:
[( 285 - 155 ) ÷ 155] x 100 = 83.87%
Formula
Percentage change = [(285 - 155) / 155] x 100
Subtract the new number by the original number
285 - 155 = 130
130 ÷ 155 = 0.8387096774193549
0.8387096774193549 x 100 = 83.87%