-83.64% is the change from 428 to 70
Calculation steps:
[( 70 - 428 ) ÷ 428] x 100 = -83.64%
Formula
Percentage change = [(70 - 428) / 428] x 100
Subtract the new number by the original number
70 - 428 = -358
-358 ÷ 428 = -0.8364485981308412
-0.8364485981308412 x 100 = -83.64%