90.8% is the change from 87 to 166
Calculation steps:
[( 166 - 87 ) ÷ 87] x 100 = 90.8%
Formula
Percentage change = [(166 - 87) / 87] x 100
Subtract the new number by the original number
166 - 87 = 79
79 ÷ 87 = 0.9080459770114943
0.9080459770114943 x 100 = 90.8%