-77.49% is the change from 311 to 70
Calculation steps:
[( 70 - 311 ) ÷ 311] x 100 = -77.49%
Formula
Percentage change = [(70 - 311) / 311] x 100
Subtract the new number by the original number
70 - 311 = -241
-241 ÷ 311 = -0.77491961414791
-0.77491961414791 x 100 = -77.49%