-15.18% is the change from 830 to 704
Calculation steps:
[( 704 - 830 ) ÷ 830] x 100 = -15.18%
Formula
Percentage change = [(704 - 830) / 830] x 100
Subtract the new number by the original number
704 - 830 = -126
-126 ÷ 830 = -0.15180722891566265
-0.15180722891566265 x 100 = -15.18%