-38.4% is the change from 349 to 215
Calculation steps:
[( 215 - 349 ) ÷ 349] x 100 = -38.4%
Formula
Percentage change = [(215 - 349) / 349] x 100
Subtract the new number by the original number
215 - 349 = -134
-134 ÷ 349 = -0.3839541547277937
-0.3839541547277937 x 100 = -38.4%