-67.9% is the change from 620 to 199
Calculation steps:
[( 199 - 620 ) ÷ 620] x 100 = -67.9%
Formula
Percentage change = [(199 - 620) / 620] x 100
Subtract the new number by the original number
199 - 620 = -421
-421 ÷ 620 = -0.6790322580645162
-0.6790322580645162 x 100 = -67.9%