71.05% is the change from 266 to 455
Calculation steps:
[( 455 - 266 ) ÷ 266] x 100 = 71.05%
Formula
Percentage change = [(455 - 266) / 266] x 100
Subtract the new number by the original number
455 - 266 = 189
189 ÷ 266 = 0.7105263157894737
0.7105263157894737 x 100 = 71.05%