-69.02% is the change from 991 to 307
Calculation steps:
[( 307 - 991 ) ÷ 991] x 100 = -69.02%
Formula
Percentage change = [(307 - 991) / 991] x 100
Subtract the new number by the original number
307 - 991 = -684
-684 ÷ 991 = -0.6902119071644803
-0.6902119071644803 x 100 = -69.02%