-82.34% is the change from 521 to 92
Calculation steps:
[( 92 - 521 ) ÷ 521] x 100 = -82.34%
Formula
Percentage change = [(92 - 521) / 521] x 100
Subtract the new number by the original number
92 - 521 = -429
-429 ÷ 521 = -0.8234165067178503
-0.8234165067178503 x 100 = -82.34%