-98.37% is the change from 918 to 15
Calculation steps:
[( 15 - 918 ) ÷ 918] x 100 = -98.37%
Formula
Percentage change = [(15 - 918) / 918] x 100
Subtract the new number by the original number
15 - 918 = -903
-903 ÷ 918 = -0.9836601307189542
-0.9836601307189542 x 100 = -98.37%