-50.7% is the change from 215 to 106
Calculation steps:
[( 106 - 215 ) ÷ 215] x 100 = -50.7%
Formula
Percentage change = [(106 - 215) / 215] x 100
Subtract the new number by the original number
106 - 215 = -109
-109 ÷ 215 = -0.5069767441860465
-0.5069767441860465 x 100 = -50.7%