-49.48% is the change from 970 to 490
Calculation steps:
[( 490 - 970 ) ÷ 970] x 100 = -49.48%
Formula
Percentage change = [(490 - 970) / 970] x 100
Subtract the new number by the original number
490 - 970 = -480
-480 ÷ 970 = -0.4948453608247423
-0.4948453608247423 x 100 = -49.48%