-38.63% is the change from 849 to 521
Calculation steps:
[( 521 - 849 ) ÷ 849] x 100 = -38.63%
Formula
Percentage change = [(521 - 849) / 849] x 100
Subtract the new number by the original number
521 - 849 = -328
-328 ÷ 849 = -0.38633686690223795
-0.38633686690223795 x 100 = -38.63%