-1.93% is the change from 517 to 507
Calculation steps:
[( 507 - 517 ) ÷ 517] x 100 = -1.93%
Formula
Percentage change = [(507 - 517) / 517] x 100
Subtract the new number by the original number
507 - 517 = -10
-10 ÷ 517 = -0.019342359767891684
-0.019342359767891684 x 100 = -1.93%