-66.98% is the change from 839 to 277
Calculation steps:
[( 277 - 839 ) ÷ 839] x 100 = -66.98%
Formula
Percentage change = [(277 - 839) / 839] x 100
Subtract the new number by the original number
277 - 839 = -562
-562 ÷ 839 = -0.6698450536352801
-0.6698450536352801 x 100 = -66.98%