-67.44% is the change from 215 to 70
Calculation steps:
[( 70 - 215 ) ÷ 215] x 100 = -67.44%
Formula
Percentage change = [(70 - 215) / 215] x 100
Subtract the new number by the original number
70 - 215 = -145
-145 ÷ 215 = -0.6744186046511628
-0.6744186046511628 x 100 = -67.44%