-98.37% is the change from 920 to 15
Calculation steps:
[( 15 - 920 ) ÷ 920] x 100 = -98.37%
Formula
Percentage change = [(15 - 920) / 920] x 100
Subtract the new number by the original number
15 - 920 = -905
-905 ÷ 920 = -0.9836956521739131
-0.9836956521739131 x 100 = -98.37%