-63.89% is the change from 864 to 312
Calculation steps:
[( 312 - 864 ) ÷ 864] x 100 = -63.89%
Formula
Percentage change = [(312 - 864) / 864] x 100
Subtract the new number by the original number
312 - 864 = -552
-552 ÷ 864 = -0.6388888888888888
-0.6388888888888888 x 100 = -63.89%