-19.3% is the change from 824 to 665
Calculation steps:
[( 665 - 824 ) ÷ 824] x 100 = -19.3%
Formula
Percentage change = [(665 - 824) / 824] x 100
Subtract the new number by the original number
665 - 824 = -159
-159 ÷ 824 = -0.1929611650485437
-0.1929611650485437 x 100 = -19.3%