-50.72% is the change from 278 to 137
Calculation steps:
[( 137 - 278 ) ÷ 278] x 100 = -50.72%
Formula
Percentage change = [(137 - 278) / 278] x 100
Subtract the new number by the original number
137 - 278 = -141
-141 ÷ 278 = -0.5071942446043165
-0.5071942446043165 x 100 = -50.72%