-40.98% is the change from 266 to 157
Calculation steps:
[( 157 - 266 ) ÷ 266] x 100 = -40.98%
Formula
Percentage change = [(157 - 266) / 266] x 100
Subtract the new number by the original number
157 - 266 = -109
-109 ÷ 266 = -0.40977443609022557
-0.40977443609022557 x 100 = -40.98%