-78.57% is the change from 980 to 210
Calculation steps:
[( 210 - 980 ) ÷ 980] x 100 = -78.57%
Formula
Percentage change = [(210 - 980) / 980] x 100
Subtract the new number by the original number
210 - 980 = -770
-770 ÷ 980 = -0.7857142857142857
-0.7857142857142857 x 100 = -78.57%