-41.12% is the change from 518 to 305
Calculation steps:
[( 305 - 518 ) ÷ 518] x 100 = -41.12%
Formula
Percentage change = [(305 - 518) / 518] x 100
Subtract the new number by the original number
305 - 518 = -213
-213 ÷ 518 = -0.4111969111969112
-0.4111969111969112 x 100 = -41.12%