Answer:
Explanation:
percent decrease = (original number - new number) / (original number) * 100
= (70 - 40) / 70 * 100
= 30/70 * 100
= 0.42857 * 100
= 42.857 % decrease....if u need it rounded, 42.86%....or if u
need it rounded to the nearest whole percent, its 43%