-26.99% is the change from 830 to 606
Calculation steps:
[( 606 - 830 ) ÷ 830] x 100 = -26.99%
Formula
Percentage change = [(606 - 830) / 830] x 100
Subtract the new number by the original number
606 - 830 = -224
-224 ÷ 830 = -0.26987951807228916
-0.26987951807228916 x 100 = -26.99%