-17.6% is the change from 517 to 426
Calculation steps:
[( 426 - 517 ) ÷ 517] x 100 = -17.6%
Formula
Percentage change = [(426 - 517) / 517] x 100
Subtract the new number by the original number
426 - 517 = -91
-91 ÷ 517 = -0.1760154738878143
-0.1760154738878143 x 100 = -17.6%