-15.3% is the change from 830 to 703
Calculation steps:
[( 703 - 830 ) ÷ 830] x 100 = -15.3%
Formula
Percentage change = [(703 - 830) / 830] x 100
Subtract the new number by the original number
703 - 830 = -127
-127 ÷ 830 = -0.1530120481927711
-0.1530120481927711 x 100 = -15.3%