-65% is the change from 620 to 217
Calculation steps:
[( 217 - 620 ) ÷ 620] x 100 = -65%
Formula
Percentage change = [(217 - 620) / 620] x 100
Subtract the new number by the original number
217 - 620 = -403
-403 ÷ 620 = -0.65
-0.65 x 100 = -65%
Example