-19.66% is the change from 524 to 421
Calculation steps:
[( 421 - 524 ) ÷ 524] x 100 = -19.66%
Formula
Percentage change = [(421 - 524) / 524] x 100
Subtract the new number by the original number
421 - 524 = -103
-103 ÷ 524 = -0.1965648854961832
-0.1965648854961832 x 100 = -19.66%