-49.63% is the change from 268 to 135
Calculation steps:
[( 135 - 268 ) ÷ 268] x 100 = -49.63%
Formula
Percentage change = [(135 - 268) / 268] x 100
Subtract the new number by the original number
135 - 268 = -133
-133 ÷ 268 = -0.4962686567164179
-0.4962686567164179 x 100 = -49.63%