-51.26% is the change from 277 to 135
Calculation steps:
[( 135 - 277 ) ÷ 277] x 100 = -51.26%
Formula
Percentage change = [(135 - 277) / 277] x 100
Subtract the new number by the original number
135 - 277 = -142
-142 ÷ 277 = -0.5126353790613718
-0.5126353790613718 x 100 = -51.26%