-20.62% is the change from 834 to 662
Calculation steps:
[( 662 - 834 ) ÷ 834] x 100 = -20.62%
Formula
Percentage change = [(662 - 834) / 834] x 100
Subtract the new number by the original number
662 - 834 = -172
-172 ÷ 834 = -0.20623501199040767
-0.20623501199040767 x 100 = -20.62%