-35.66% is the change from 830 to 534
Calculation steps:
[( 534 - 830 ) ÷ 830] x 100 = -35.66%
Formula
Percentage change = [(534 - 830) / 830] x 100
Subtract the new number by the original number
534 - 830 = -296
-296 ÷ 830 = -0.3566265060240964
-0.3566265060240964 x 100 = -35.66%