-79.61% is the change from 515 to 105
Calculation steps:
[( 105 - 515 ) ÷ 515] x 100 = -79.61%
Formula
Percentage change = [(105 - 515) / 515] x 100
Subtract the new number by the original number
105 - 515 = -410
-410 ÷ 515 = -0.7961165048543689
-0.7961165048543689 x 100 = -79.61%