-90% is the change from 620 to 62
Calculation steps:
[( 62 - 620 ) ÷ 620] x 100 = -90%
Formula
Percentage change = [(62 - 620) / 620] x 100
Subtract the new number by the original number
62 - 620 = -558
-558 ÷ 620 = -0.9
-0.9 x 100 = -90%
Example