-56.5% is the change from 623 to 271
Calculation steps:
[( 271 - 623 ) ÷ 623] x 100 = -56.5%
Formula
Percentage change = [(271 - 623) / 623] x 100
Subtract the new number by the original number
271 - 623 = -352
-352 ÷ 623 = -0.565008025682183
-0.565008025682183 x 100 = -56.5%