Percent Sense
12-2
Compare. Use or .
- 50% of 20 50% of 40 2. 20% of 30 20% of 10
- 2% of 40 2% of 80 4. 3% of 10 3% of 4
- 33 ^13 % of 30? 33 31 % of 3 6. 16 ^23 % of 12? 16 32 % of 60
??
??
Which is greater:
3% of 100 or 30% of 100?
The pictures show that
30% of 100 3% of 100.
0.3 100 0.03 100 3%0.03 30%0.3
30 3
Which is less:
30% of 60 or 30% of 80?
The pictures show that
30% of 60 30% of 80.
0.3 60 0.3 80
18 24
You can use mental math to estimate what percent
one number is of another.
Math class is 55 minutes long.
Ten minutes are used to check homework.
Trueor False: 10 minutes is more than 50%
of the class time.
Is ^1505 50%?
The statement is false.
Think
50% is. of 55 is more than of 50, which is 25.
10 minutes is less than 50% of the class time.
1
2
1
2
1
2
(^121)
2
3
4
7 6 5
9
8
10
11
10 minutes
(^12) of 55
1.0
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