-62.04% is the change from 814 to 309
Calculation steps:
[( 309 - 814 ) ÷ 814] x 100 = -62.04%
Formula
Percentage change = [(309 - 814) / 814] x 100
Subtract the new number by the original number
309 - 814 = -505
-505 ÷ 814 = -0.6203931203931204
-0.6203931203931204 x 100 = -62.04%