-31.82% is the change from 308 to 210
Calculation steps:
[( 210 - 308 ) ÷ 308] x 100 = -31.82%
Formula
Percentage change = [(210 - 308) / 308] x 100
Subtract the new number by the original number
210 - 308 = -98
-98 ÷ 308 = -0.3181818181818182
-0.3181818181818182 x 100 = -31.82%