-49.49% is the change from 972 to 491
Calculation steps:
[( 491 - 972 ) ÷ 972] x 100 = -49.49%
Formula
Percentage change = [(491 - 972) / 972] x 100
Subtract the new number by the original number
491 - 972 = -481
-481 ÷ 972 = -0.4948559670781893
-0.4948559670781893 x 100 = -49.49%