-49.11% is the change from 507 to 258
Calculation steps:
[( 258 - 507 ) ÷ 507] x 100 = -49.11%
Formula
Percentage change = [(258 - 507) / 507] x 100
Subtract the new number by the original number
258 - 507 = -249
-249 ÷ 507 = -0.4911242603550296
-0.4911242603550296 x 100 = -49.11%