-52.14% is the change from 280 to 134
Calculation steps:
[( 134 - 280 ) ÷ 280] x 100 = -52.14%
Formula
Percentage change = [(134 - 280) / 280] x 100
Subtract the new number by the original number
134 - 280 = -146
-146 ÷ 280 = -0.5214285714285715
-0.5214285714285715 x 100 = -52.14%