-53% is the change from 217 to 102
Calculation steps:
[( 102 - 217 ) ÷ 217] x 100 = -53%
Formula
Percentage change = [(102 - 217) / 217] x 100
Subtract the new number by the original number
102 - 217 = -115
-115 ÷ 217 = -0.5299539170506913
-0.5299539170506913 x 100 = -53%