-98% is the change from 649 to 13
Calculation steps:
[( 13 - 649 ) ÷ 649] x 100 = -98%
Formula
Percentage change = [(13 - 649) / 649] x 100
Subtract the new number by the original number
13 - 649 = -636
-636 ÷ 649 = -0.9799691833590138
-0.9799691833590138 x 100 = -98%