-71.63% is the change from 215 to 61
Calculation steps:
[( 61 - 215 ) ÷ 215] x 100 = -71.63%
Formula
Percentage change = [(61 - 215) / 215] x 100
Subtract the new number by the original number
61 - 215 = -154
-154 ÷ 215 = -0.7162790697674418
-0.7162790697674418 x 100 = -71.63%