-78.1% is the change from 315 to 69
Calculation steps:
[( 69 - 315 ) ÷ 315] x 100 = -78.1%
Formula
Percentage change = [(69 - 315) / 315] x 100
Subtract the new number by the original number
69 - 315 = -246
-246 ÷ 315 = -0.780952380952381
-0.780952380952381 x 100 = -78.1%