82.
70 + 80 + 70 + 30+ 80 + 80+ 80 = 490
80 is. ------------------------------------------- The mean average is calculated by adding up the numbers and dividing by how many there are: mean average = (80 + 60 + 70 + 110) ÷ 4 = 320 ÷ 4 = 80
The mean, or average is 86
let x = decrease 80- 80 x = 70 80(1-x) = 70 1-x =70/80 x = 1-70/80 = 0.125 = 12.5%
70 and 80 is 150.
80 - 70% = 80 x (1 - (70/100)) = 24
56/80 x 100 = 70 Therefore, 56 is 70 percent of 80.
80 percent of seventy = 5680% of 70= 80% * 70= 0.80 * 70= 56
70/80 = 0.875 = 87.5%
70 + 80 -------- 150
70% of 80 is 56.