-62.1% is the change from 620 to 235
Calculation steps:
[( 235 - 620 ) ÷ 620] x 100 = -62.1%
Formula
Percentage change = [(235 - 620) / 620] x 100
Subtract the new number by the original number
235 - 620 = -385
-385 ÷ 620 = -0.6209677419354839
-0.6209677419354839 x 100 = -62.1%