-98.39% is the change from 929 to 15
Calculation steps:
[( 15 - 929 ) ÷ 929] x 100 = -98.39%
Formula
Percentage change = [(15 - 929) / 929] x 100
Subtract the new number by the original number
15 - 929 = -914
-914 ÷ 929 = -0.9838536060279871
-0.9838536060279871 x 100 = -98.39%