-35.3% is the change from 830 to 537
Calculation steps:
[( 537 - 830 ) ÷ 830] x 100 = -35.3%
Formula
Percentage change = [(537 - 830) / 830] x 100
Subtract the new number by the original number
537 - 830 = -293
-293 ÷ 830 = -0.3530120481927711
-0.3530120481927711 x 100 = -35.3%