-66.63% is the change from 824 to 275
Calculation steps:
[( 275 - 824 ) ÷ 824] x 100 = -66.63%
Formula
Percentage change = [(275 - 824) / 824] x 100
Subtract the new number by the original number
275 - 824 = -549
-549 ÷ 824 = -0.6662621359223301
-0.6662621359223301 x 100 = -66.63%