-91.43% is the change from 70 to 6
Calculation steps:
[( 6 - 70 ) ÷ 70] x 100 = -91.43%
Formula
Percentage change = [(6 - 70) / 70] x 100
Subtract the new number by the original number
6 - 70 = -64
-64 ÷ 70 = -0.9142857142857143
-0.9142857142857143 x 100 = -91.43%