-78.87% is the change from 620 to 131
Calculation steps:
[( 131 - 620 ) ÷ 620] x 100 = -78.87%
Formula
Percentage change = [(131 - 620) / 620] x 100
Subtract the new number by the original number
131 - 620 = -489
-489 ÷ 620 = -0.7887096774193548
-0.7887096774193548 x 100 = -78.87%
Example