-49.4% is the change from 832 to 421
Calculation steps:
[( 421 - 832 ) ÷ 832] x 100 = -49.4%
Formula
Percentage change = [(421 - 832) / 832] x 100
Subtract the new number by the original number
421 - 832 = -411
-411 ÷ 832 = -0.49399038461538464
-0.49399038461538464 x 100 = -49.4%