-38.65% is the change from 163 to 100
Calculation steps:
[( 100 - 163 ) ÷ 163] x 100 = -38.65%
Formula
Percentage change = [(100 - 163) / 163] x 100
Subtract the new number by the original number
100 - 163 = -63
-63 ÷ 163 = -0.38650306748466257
-0.38650306748466257 x 100 = -38.65%