-18.62% is the change from 623 to 507
Calculation steps:
[( 507 - 623 ) ÷ 623] x 100 = -18.62%
Formula
Percentage change = [(507 - 623) / 623] x 100
Subtract the new number by the original number
507 - 623 = -116
-116 ÷ 623 = -0.18619582664526485
-0.18619582664526485 x 100 = -18.62%