-67.44% is the change from 857 to 279
Calculation steps:
[( 279 - 857 ) ÷ 857] x 100 = -67.44%
Formula
Percentage change = [(279 - 857) / 857] x 100
Subtract the new number by the original number
279 - 857 = -578
-578 ÷ 857 = -0.6744457409568262
-0.6744457409568262 x 100 = -67.44%