-55.63% is the change from 311 to 138
Calculation steps:
[( 138 - 311 ) ÷ 311] x 100 = -55.63%
Formula
Percentage change = [(138 - 311) / 311] x 100
Subtract the new number by the original number
138 - 311 = -173
-173 ÷ 311 = -0.5562700964630225
-0.5562700964630225 x 100 = -55.63%