-64.99% is the change from 997 to 349
Calculation steps:
[( 349 - 997 ) ÷ 997] x 100 = -64.99%
Formula
Percentage change = [(349 - 997) / 997] x 100
Subtract the new number by the original number
349 - 997 = -648
-648 ÷ 997 = -0.649949849548646
-0.649949849548646 x 100 = -64.99%