let x = decrease
80- 80 x = 70
80(1-x) = 70
1-x =70/80
x = 1-70/80 = 0.125 = 12.5%
Chat with our AI personalities
56/80 x 100 = 70 Therefore, 56 is 70 percent of 80.
The average is 80.
Percentage decrease from 70 to 30 is ((70 - 30)/70) x 100 = (40/70) x 100 = 4000/70 = 400/7 = 57.14%
The halfway point between 70 and 80 is (70 + 80) ÷ 2 = 75
80*7/8 = 70