-66.14% is the change from 830 to 281
Calculation steps:
[( 281 - 830 ) ÷ 830] x 100 = -66.14%
Formula
Percentage change = [(281 - 830) / 830] x 100
Subtract the new number by the original number
281 - 830 = -549
-549 ÷ 830 = -0.6614457831325301
-0.6614457831325301 x 100 = -66.14%