-82.32% is the change from 311 to 55
Calculation steps:
[( 55 - 311 ) ÷ 311] x 100 = -82.32%
Formula
Percentage change = [(55 - 311) / 311] x 100
Subtract the new number by the original number
55 - 311 = -256
-256 ÷ 311 = -0.8231511254019293
-0.8231511254019293 x 100 = -82.32%