-45.68% is the change from 521 to 283
Calculation steps:
[( 283 - 521 ) ÷ 521] x 100 = -45.68%
Formula
Percentage change = [(283 - 521) / 521] x 100
Subtract the new number by the original number
283 - 521 = -238
-238 ÷ 521 = -0.45681381957773515
-0.45681381957773515 x 100 = -45.68%