-12.82% is the change from 117 to 102
Calculation steps:
[( 102 - 117 ) ÷ 117] x 100 = -12.82%
Formula
Percentage change = [(102 - 117) / 117] x 100
Subtract the new number by the original number
102 - 117 = -15
-15 ÷ 117 = -0.1282051282051282
-0.1282051282051282 x 100 = -12.82%