-83.42% is the change from 609 to 101
Calculation steps:
[( 101 - 609 ) ÷ 609] x 100 = -83.42%
Formula
Percentage change = [(101 - 609) / 609] x 100
Subtract the new number by the original number
101 - 609 = -508
-508 ÷ 609 = -0.8341543513957307
-0.8341543513957307 x 100 = -83.42%