-66.13% is the change from 620 to 210
Calculation steps:
[( 210 - 620 ) ÷ 620] x 100 = -66.13%
Formula
Percentage change = [(210 - 620) / 620] x 100
Subtract the new number by the original number
210 - 620 = -410
-410 ÷ 620 = -0.6612903225806451
-0.6612903225806451 x 100 = -66.13%