-50.73% is the change from 274 to 135
Calculation steps:
[( 135 - 274 ) ÷ 274] x 100 = -50.73%
Formula
Percentage change = [(135 - 274) / 274] x 100
Subtract the new number by the original number
135 - 274 = -139
-139 ÷ 274 = -0.5072992700729927
-0.5072992700729927 x 100 = -50.73%