-36.92% is the change from 826 to 521
Calculation steps:
[( 521 - 826 ) ÷ 826] x 100 = -36.92%
Formula
Percentage change = [(521 - 826) / 826] x 100
Subtract the new number by the original number
521 - 826 = -305
-305 ÷ 826 = -0.3692493946731235
-0.3692493946731235 x 100 = -36.92%