-78.89% is the change from 521 to 110
Calculation steps:
[( 110 - 521 ) ÷ 521] x 100 = -78.89%
Formula
Percentage change = [(110 - 521) / 521] x 100
Subtract the new number by the original number
110 - 521 = -411
-411 ÷ 521 = -0.7888675623800384
-0.7888675623800384 x 100 = -78.89%