-96.17% is the change from 392 to 15
Calculation steps:
[( 15 - 392 ) ÷ 392] x 100 = -96.17%
Formula
Percentage change = [(15 - 392) / 392] x 100
Subtract the new number by the original number
15 - 392 = -377
-377 ÷ 392 = -0.9617346938775511
-0.9617346938775511 x 100 = -96.17%