-77.12% is the change from 306 to 70
Calculation steps:
[( 70 - 306 ) ÷ 306] x 100 = -77.12%
Formula
Percentage change = [(70 - 306) / 306] x 100
Subtract the new number by the original number
70 - 306 = -236
-236 ÷ 306 = -0.7712418300653595
-0.7712418300653595 x 100 = -77.12%