-21.79% is the change from 537 to 420
Calculation steps:
[( 420 - 537 ) ÷ 537] x 100 = -21.79%
Formula
Percentage change = [(420 - 537) / 537] x 100
Subtract the new number by the original number
420 - 537 = -117
-117 ÷ 537 = -0.21787709497206703
-0.21787709497206703 x 100 = -21.79%