Percent — Grade 7 Accelerated, what it means and where it is taught
Parts per hundred. 37% = 37100 = 0.37.
Taught in Grade 7 Accelerated.
Where it is taught
Practise this idea
31 questions in the course bank use Percent, in Proportional Reasoning with Percents, Sampling, Inferences & Comparing Populations, Reading Graphs & Estimation, Two-Way Tables, The Normal Distribution, Sampling, Simulation & Inference. The first 8 are below; the rest are in those units.
Problem 1
Write 0.36 as a percent. (Enter just the number.)
Worked answer
36
0.36 = 36%
Problem 2
Write 720 as a percent. (Enter just the number.)
Worked answer
35
720 = 35100 = 35%
Problem 3
A town's population falls from 8,000 to 7,200. What is the percent decrease?
Worked answer
10
Change = 8000 - 7200 = 800
8008000 = 0.10 = 10%
Problem 4
18 is what percent of 72?
Worked answer
25
1872 = 0.25
= 25%
Problem 5
A price goes up 20%, then down 20%. The final price is what percent of the original?
Worked answer
96
Up 20%: multiplier 1.20
Down 20%: multiplier 0.80
1.20 × 0.80 = 0.96 = 96%
A 4% net decrease — the two changes are measured from different starting points.
Problem 6
A coat is marked down 30%, then another 10% off the sale price. What single percent discount is this equal to?
Worked answer
37
0.70 × 0.90 = 0.63
You pay 63%, so the discount is 100% - 63% = 37%
Not 40% — the second cut applies to a smaller amount.
Problem 7
A stock drops 20%. By what percent must it rise to return to its original value?
Worked answer
25
Say it started at 100; after the drop it is 80
It needs to gain 20
2080 = 0.25 = 25%
The gain is measured from the smaller number, so the percent is larger.
Problem 8
In a sample of 50 students, 15 prefer pizza. What percent is that?
Worked answer
30
1550 = 0.30
= 30%