-8.18% is the change from 220 to 202
Calculation steps:
[( 202 - 220 ) ÷ 220] x 100 = -8.18%
Formula
Percentage change = [(202 - 220) / 220] x 100
Subtract the new number by the original number
202 - 220 = -18
-18 ÷ 220 = -0.08181818181818182
-0.08181818181818182 x 100 = -8.18%