-76.3% is the change from 422 to 100
Calculation steps:
[( 100 - 422 ) ÷ 422] x 100 = -76.3%
Formula
Percentage change = [(100 - 422) / 422] x 100
Subtract the new number by the original number
100 - 422 = -322
-322 ÷ 422 = -0.7630331753554502
-0.7630331753554502 x 100 = -76.3%