-20.3% is the change from 527 to 420
Calculation steps:
[( 420 - 527 ) ÷ 527] x 100 = -20.3%
Formula
Percentage change = [(420 - 527) / 527] x 100
Subtract the new number by the original number
420 - 527 = -107
-107 ÷ 527 = -0.2030360531309298
-0.2030360531309298 x 100 = -20.3%