-72% is the change from 300 to 84
Calculation steps:
[( 84 - 300 ) ÷ 300] x 100 = -72%
Formula
Percentage change = [(84 - 300) / 300] x 100
Subtract the new number by the original number
84 - 300 = -216
-216 ÷ 300 = -0.72
-0.72 x 100 = -72%
Example