-66.98% is the change from 215 to 71
Calculation steps:
[( 71 - 215 ) ÷ 215] x 100 = -66.98%
Formula
Percentage change = [(71 - 215) / 215] x 100
Subtract the new number by the original number
71 - 215 = -144
-144 ÷ 215 = -0.6697674418604651
-0.6697674418604651 x 100 = -66.98%