-62.74% is the change from 620 to 231
Calculation steps:
[( 231 - 620 ) ÷ 620] x 100 = -62.74%
Formula
Percentage change = [(231 - 620) / 620] x 100
Subtract the new number by the original number
231 - 620 = -389
-389 ÷ 620 = -0.6274193548387097
-0.6274193548387097 x 100 = -62.74%