-29.87% is the change from 827 to 580
Calculation steps:
[( 580 - 827 ) ÷ 827] x 100 = -29.87%
Formula
Percentage change = [(580 - 827) / 827] x 100
Subtract the new number by the original number
580 - 827 = -247
-247 ÷ 827 = -0.29866989117291415
-0.29866989117291415 x 100 = -29.87%