-92.99% is the change from 214 to 15
Calculation steps:
[( 15 - 214 ) ÷ 214] x 100 = -92.99%
Formula
Percentage change = [(15 - 214) / 214] x 100
Subtract the new number by the original number
15 - 214 = -199
-199 ÷ 214 = -0.9299065420560748
-0.9299065420560748 x 100 = -92.99%