-61.98% is the change from 839 to 319
Calculation steps:
[( 319 - 839 ) ÷ 839] x 100 = -61.98%
Formula
Percentage change = [(319 - 839) / 839] x 100
Subtract the new number by the original number
319 - 839 = -520
-520 ÷ 839 = -0.6197854588796186
-0.6197854588796186 x 100 = -61.98%