-72% is the change from 850 to 238
Calculation steps:
[( 238 - 850 ) ÷ 850] x 100 = -72%
Formula
Percentage change = [(238 - 850) / 850] x 100
Subtract the new number by the original number
238 - 850 = -612
-612 ÷ 850 = -0.72
-0.72 x 100 = -72%
Example