57.99% is the change from 538 to 850
Calculation steps:
[( 850 - 538 ) ÷ 538] x 100 = 57.99%
Formula
Percentage change = [(850 - 538) / 538] x 100
Subtract the new number by the original number
850 - 538 = 312
312 ÷ 538 = 0.5799256505576208
0.5799256505576208 x 100 = 57.99%