-35.42% is the change from 830 to 536
Calculation steps:
[( 536 - 830 ) ÷ 830] x 100 = -35.42%
Formula
Percentage change = [(536 - 830) / 830] x 100
Subtract the new number by the original number
536 - 830 = -294
-294 ÷ 830 = -0.3542168674698795
-0.3542168674698795 x 100 = -35.42%