-17.65% is the change from 102 to 84
Calculation steps:
[( 84 - 102 ) ÷ 102] x 100 = -17.65%
Formula
Percentage change = [(84 - 102) / 102] x 100
Subtract the new number by the original number
84 - 102 = -18
-18 ÷ 102 = -0.17647058823529413
-0.17647058823529413 x 100 = -17.65%