-20% is the change from 415 to 332
Calculation steps:
[( 332 - 415 ) ÷ 415] x 100 = -20%
Formula
Percentage change = [(332 - 415) / 415] x 100
Subtract the new number by the original number
332 - 415 = -83
-83 ÷ 415 = -0.2
-0.2 x 100 = -20%
Example