667.86% is the change from 28 to 215
Calculation steps:
[( 215 - 28 ) ÷ 28] x 100 = 667.86%
Formula
Percentage change = [(215 - 28) / 28] x 100
Subtract the new number by the original number
215 - 28 = 187
187 ÷ 28 = 6.678571428571429
6.678571428571429 x 100 = 667.86%