-88.04% is the change from 510 to 61
Calculation steps:
[( 61 - 510 ) ÷ 510] x 100 = -88.04%
Formula
Percentage change = [(61 - 510) / 510] x 100
Subtract the new number by the original number
61 - 510 = -449
-449 ÷ 510 = -0.8803921568627451
-0.8803921568627451 x 100 = -88.04%