-18.05% is the change from 637 to 522
Calculation steps:
[( 522 - 637 ) ÷ 637] x 100 = -18.05%
Formula
Percentage change = [(522 - 637) / 637] x 100
Subtract the new number by the original number
522 - 637 = -115
-115 ÷ 637 = -0.18053375196232338
-0.18053375196232338 x 100 = -18.05%