-50.18% is the change from 277 to 138
Calculation steps:
[( 138 - 277 ) ÷ 277] x 100 = -50.18%
Formula
Percentage change = [(138 - 277) / 277] x 100
Subtract the new number by the original number
138 - 277 = -139
-139 ÷ 277 = -0.5018050541516246
-0.5018050541516246 x 100 = -50.18%