-30.3% is the change from 33 to 23
Calculation steps:
[( 23 - 33 ) ÷ 33] x 100 = -30.3%
Formula
Percentage change = [(23 - 33) / 33] x 100
Subtract the new number by the original number
23 - 33 = -10
-10 ÷ 33 = -0.30303030303030304
-0.30303030303030304 x 100 = -30.3%