-29.98% is the change from 507 to 355
Calculation steps:
[( 355 - 507 ) ÷ 507] x 100 = -29.98%
Formula
Percentage change = [(355 - 507) / 507] x 100
Subtract the new number by the original number
355 - 507 = -152
-152 ÷ 507 = -0.29980276134122286
-0.29980276134122286 x 100 = -29.98%