-42.6% is the change from 507 to 291
Calculation steps:
[( 291 - 507 ) ÷ 507] x 100 = -42.6%
Formula
Percentage change = [(291 - 507) / 507] x 100
Subtract the new number by the original number
291 - 507 = -216
-216 ÷ 507 = -0.4260355029585799
-0.4260355029585799 x 100 = -42.6%