-30.03% is the change from 303 to 212
Calculation steps:
[( 212 - 303 ) ÷ 303] x 100 = -30.03%
Formula
Percentage change = [(212 - 303) / 303] x 100
Subtract the new number by the original number
212 - 303 = -91
-91 ÷ 303 = -0.30033003300330036
-0.30033003300330036 x 100 = -30.03%