-17.34% is the change from 646 to 534
Calculation steps:
[( 534 - 646 ) ÷ 646] x 100 = -17.34%
Formula
Percentage change = [(534 - 646) / 646] x 100
Subtract the new number by the original number
534 - 646 = -112
-112 ÷ 646 = -0.17337461300309598
-0.17337461300309598 x 100 = -17.34%