-62.61% is the change from 821 to 307
Calculation steps:
[( 307 - 821 ) ÷ 821] x 100 = -62.61%
Formula
Percentage change = [(307 - 821) / 821] x 100
Subtract the new number by the original number
307 - 821 = -514
-514 ÷ 821 = -0.6260657734470159
-0.6260657734470159 x 100 = -62.61%