-96.45% is the change from 422 to 15
Calculation steps:
[( 15 - 422 ) ÷ 422] x 100 = -96.45%
Formula
Percentage change = [(15 - 422) / 422] x 100
Subtract the new number by the original number
15 - 422 = -407
-407 ÷ 422 = -0.9644549763033176
-0.9644549763033176 x 100 = -96.45%