-2.12% is the change from 518 to 507
Calculation steps:
[( 507 - 518 ) ÷ 518] x 100 = -2.12%
Formula
Percentage change = [(507 - 518) / 518] x 100
Subtract the new number by the original number
507 - 518 = -11
-11 ÷ 518 = -0.021235521235521235
-0.021235521235521235 x 100 = -2.12%