-38.25% is the change from 834 to 515
Calculation steps:
[( 515 - 834 ) ÷ 834] x 100 = -38.25%
Formula
Percentage change = [(515 - 834) / 834] x 100
Subtract the new number by the original number
515 - 834 = -319
-319 ÷ 834 = -0.3824940047961631
-0.3824940047961631 x 100 = -38.25%