-49.38% is the change from 970 to 491
Calculation steps:
[( 491 - 970 ) ÷ 970] x 100 = -49.38%
Formula
Percentage change = [(491 - 970) / 970] x 100
Subtract the new number by the original number
491 - 970 = -479
-479 ÷ 970 = -0.49381443298969074
-0.49381443298969074 x 100 = -49.38%