-45.42% is the change from 830 to 453
Calculation steps:
[( 453 - 830 ) ÷ 830] x 100 = -45.42%
Formula
Percentage change = [(453 - 830) / 830] x 100
Subtract the new number by the original number
453 - 830 = -377
-377 ÷ 830 = -0.4542168674698795
-0.4542168674698795 x 100 = -45.42%