Percents
What is 15 percent of 50?
7.5
A local car wash can clean 51 vehicles in 1.5 hours. At this rate, how many can be cleaned in 12 hours?
408 cars
12 sheets of paper out of 28
Wrote ratio as a fraction in simplist form.
3/7
What does it mean to be proportional?
To have the same ratio.
Example: 1/2 = 4/8
-4x + 12 = 4
Solve.
X=2
What is 8% of 34?
2.72
Three pounds of pears cost $3.57. At this rate, how much would 10 pounds cost?
$11.90
20 blue jays out of 35 birds
Write ratio as a fraction and simplist form.
4/7
X/4 = 12/20
X = 2.4
50 = 5x - 25
Solve.
X=15
What is 1/8 written as a percent?
12.5%
What does this slope (rate of change) mean?
Rise/Run
Difference of y-values/Difference of x-values.
You buy 5 pounds for $35. How much does one pound cost?
$7 a pound
If eight trash bags last for thirty days, then twenty-eight trash bags will last for how many days?
75 days
5/8x + 4 = 12
X=64/5
What is the percent increase of $80 to $120?
50%
Which has the greater unit rate and how much greater is it?
212 miles in 4 hours or 156 miles in 3 hours
212/4 by 1
53 the other is 52
A Toyota Prius drove 208 miles on 5 gallons of gas. How far should it be able to go on a full, 11 gallon, tank?
457.6 miles
Sam drove 320 miles in 2.5 hours, how long will it take to drive 500 at the same rate (speed)?
3.91 hours
-3x + 12= -24
Solve.
X=12
A bracelet has red, white, and blue beads. There are 48 beads in the bracelet. 12 of the beads are red. What percent of the beads are red?
25%
If a painter can paint 200 square feet of walls in one-half hour, how many square feet will he paint in 5 hours?
2000 square feet.
A six-pack of Coke costs $2.09. At this rate, how much should 32 cans cost?
Approximately $11.15
The Lakers have won 27 games and lost 17 games. At this rate, how many games should they win, in an 82 game season?
Approximately 50 games.
7.2x - 8= 56
X=8.88