-64.58% is the change from 830 to 294
Calculation steps:
[( 294 - 830 ) ÷ 830] x 100 = -64.58%
Formula
Percentage change = [(294 - 830) / 830] x 100
Subtract the new number by the original number
294 - 830 = -536
-536 ÷ 830 = -0.6457831325301204
-0.6457831325301204 x 100 = -64.58%