-35.01% is the change from 997 to 648
Calculation steps:
[( 648 - 997 ) ÷ 997] x 100 = -35.01%
Formula
Percentage change = [(648 - 997) / 997] x 100
Subtract the new number by the original number
648 - 997 = -349
-349 ÷ 997 = -0.35005015045135407
-0.35005015045135407 x 100 = -35.01%