-31.53% is the change from 314 to 215
Calculation steps:
[( 215 - 314 ) ÷ 314] x 100 = -31.53%
Formula
Percentage change = [(215 - 314) / 314] x 100
Subtract the new number by the original number
215 - 314 = -99
-99 ÷ 314 = -0.31528662420382164
-0.31528662420382164 x 100 = -31.53%