-47.47% is the change from 257 to 135
Calculation steps:
[( 135 - 257 ) ÷ 257] x 100 = -47.47%
Formula
Percentage change = [(135 - 257) / 257] x 100
Subtract the new number by the original number
135 - 257 = -122
-122 ÷ 257 = -0.47470817120622566
-0.47470817120622566 x 100 = -47.47%