-57.89% is the change from 931 to 392
Calculation steps:
[( 392 - 931 ) ÷ 931] x 100 = -57.89%
Formula
Percentage change = [(392 - 931) / 931] x 100
Subtract the new number by the original number
392 - 931 = -539
-539 ÷ 931 = -0.5789473684210527
-0.5789473684210527 x 100 = -57.89%