-3.26% is the change from 215 to 208
Calculation steps:
[( 208 - 215 ) ÷ 215] x 100 = -3.26%
Formula
Percentage change = [(208 - 215) / 215] x 100
Subtract the new number by the original number
208 - 215 = -7
-7 ÷ 215 = -0.03255813953488372
-0.03255813953488372 x 100 = -3.26%