-36.63% is the change from 830 to 526
Calculation steps:
[( 526 - 830 ) ÷ 830] x 100 = -36.63%
Formula
Percentage change = [(526 - 830) / 830] x 100
Subtract the new number by the original number
526 - 830 = -304
-304 ÷ 830 = -0.36626506024096384
-0.36626506024096384 x 100 = -36.63%