-35.12% is the change from 803 to 521
Calculation steps:
[( 521 - 803 ) ÷ 803] x 100 = -35.12%
Formula
Percentage change = [(521 - 803) / 803] x 100
Subtract the new number by the original number
521 - 803 = -282
-282 ÷ 803 = -0.35118306351183065
-0.35118306351183065 x 100 = -35.12%