-80.39% is the change from 515 to 101
Calculation steps:
[( 101 - 515 ) ÷ 515] x 100 = -80.39%
Formula
Percentage change = [(101 - 515) / 515] x 100
Subtract the new number by the original number
101 - 515 = -414
-414 ÷ 515 = -0.8038834951456311
-0.8038834951456311 x 100 = -80.39%