-47.1% is the change from 397 to 210
Calculation steps:
[( 210 - 397 ) ÷ 397] x 100 = -47.1%
Formula
Percentage change = [(210 - 397) / 397] x 100
Subtract the new number by the original number
210 - 397 = -187
-187 ÷ 397 = -0.47103274559193953
-0.47103274559193953 x 100 = -47.1%