-63.01% is the change from 173 to 64
Calculation steps:
[( 64 - 173 ) ÷ 173] x 100 = -63.01%
Formula
Percentage change = [(64 - 173) / 173] x 100
Subtract the new number by the original number
64 - 173 = -109
-109 ÷ 173 = -0.630057803468208
-0.630057803468208 x 100 = -63.01%