-97% is the change from 633 to 19
Calculation steps:
[( 19 - 633 ) ÷ 633] x 100 = -97%
Formula
Percentage change = [(19 - 633) / 633] x 100
Subtract the new number by the original number
19 - 633 = -614
-614 ÷ 633 = -0.9699842022116903
-0.9699842022116903 x 100 = -97%