-69.14% is the change from 324 to 100
Calculation steps:
[( 100 - 324 ) ÷ 324] x 100 = -69.14%
Formula
Percentage change = [(100 - 324) / 324] x 100
Subtract the new number by the original number
100 - 324 = -224
-224 ÷ 324 = -0.691358024691358
-0.691358024691358 x 100 = -69.14%