-62.42% is the change from 817 to 307
Calculation steps:
[( 307 - 817 ) ÷ 817] x 100 = -62.42%
Formula
Percentage change = [(307 - 817) / 817] x 100
Subtract the new number by the original number
307 - 817 = -510
-510 ÷ 817 = -0.6242350061199511
-0.6242350061199511 x 100 = -62.42%