-90.78% is the change from 217 to 20
Calculation steps:
[( 20 - 217 ) ÷ 217] x 100 = -90.78%
Formula
Percentage change = [(20 - 217) / 217] x 100
Subtract the new number by the original number
20 - 217 = -197
-197 ÷ 217 = -0.9078341013824884
-0.9078341013824884 x 100 = -90.78%