-66.26% is the change from 824 to 278
Calculation steps:
[( 278 - 824 ) ÷ 824] x 100 = -66.26%
Formula
Percentage change = [(278 - 824) / 824] x 100
Subtract the new number by the original number
278 - 824 = -546
-546 ÷ 824 = -0.662621359223301
-0.662621359223301 x 100 = -66.26%