-19.85% is the change from 524 to 420
Calculation steps:
[( 420 - 524 ) ÷ 524] x 100 = -19.85%
Formula
Percentage change = [(420 - 524) / 524] x 100
Subtract the new number by the original number
420 - 524 = -104
-104 ÷ 524 = -0.1984732824427481
-0.1984732824427481 x 100 = -19.85%