wat is
1. 20% of 7
2 .33% of 28
3. 52 % of 42
4. 82% of 6
5. 87% of 16
6. 130% of 30
7. 69% of 8
8. 400% of 9
9. 60% of 3
10. 3% of 117
11. 96% of 88
simple questions???
2008-07-21 5:16 pm
回答 (7)
2008-07-21 5:23 pm
✔ 最佳答案
Multiply 7 by (20/100)...each percentage is (number diveded by 100). Like 33/100 is 33%.
So for #2, just do 28 x (33/100)
and similarily for the rest...
2008-07-22 12:33 am
1)
7 x 20%
= 7 x 20/100
= 7 x 1/5
= 7/5
= 1.4
2)
28 x 33%
= 28 x 33/100
= 924/100
= 9.24
3)
42 x 52%
= 42 x 52/100
= 42 x 13/25
= 546/25
= 21.84
4)
6 x 82%
= 6 x 82/100
= 6 x 41/100
= 246/100
= 2.46
5)
16 x 87%
= 16 x 87/100
= 1392/100
= 13.92
6)
30 x 130%
= 30 x 130/100
= 30 x 13/10
= 390/10
= 39
7)
8 x 69%
= 8 x 69/100
= 552/100
= 5.52
8)
9 x 400%
= 9 x 400/100
= 9 x 4
= 36
9)
3 x 60%
= 3 x 60/100
= 3 x 3/5
= 9/5
= 1.8
10)
117 x 3%
= 117 x 3/100
= 351/100
= 3.51
11)
88 x 96%
= 88 x 96/100
= 88 x 24/25
= 2112/25
= 84.48
7 x 20%
= 7 x 20/100
= 7 x 1/5
= 7/5
= 1.4
2)
28 x 33%
= 28 x 33/100
= 924/100
= 9.24
3)
42 x 52%
= 42 x 52/100
= 42 x 13/25
= 546/25
= 21.84
4)
6 x 82%
= 6 x 82/100
= 6 x 41/100
= 246/100
= 2.46
5)
16 x 87%
= 16 x 87/100
= 1392/100
= 13.92
6)
30 x 130%
= 30 x 130/100
= 30 x 13/10
= 390/10
= 39
7)
8 x 69%
= 8 x 69/100
= 552/100
= 5.52
8)
9 x 400%
= 9 x 400/100
= 9 x 4
= 36
9)
3 x 60%
= 3 x 60/100
= 3 x 3/5
= 9/5
= 1.8
10)
117 x 3%
= 117 x 3/100
= 351/100
= 3.51
11)
88 x 96%
= 88 x 96/100
= 88 x 24/25
= 2112/25
= 84.48
2008-07-22 12:28 am
20% of 7
here 20% = 20/100
of means multiplication
so 20% of 7
= 20/100 Ã 7
= 20 Ã 7/100 = 1.4
on this basis slove other problems
--------
here 20% = 20/100
of means multiplication
so 20% of 7
= 20/100 Ã 7
= 20 Ã 7/100 = 1.4
on this basis slove other problems
--------
2008-07-22 12:24 am
One problem. You can easily do the rest.
7. 69% of 8
Multiply 8 by 69 and divide by 100.
(8)(69/100)=5.52 %
7. 69% of 8
Multiply 8 by 69 and divide by 100.
(8)(69/100)=5.52 %
2008-07-22 12:22 am
Basically, all of these problems involve setting up proportions.
1. 20% of 7
20/100 = x/7
Solve for x by cross multiplying.
7*20 = 100x
x = (7*20)/100
x = 1.4
6. 130% of 30
130/100 = x/30
x = (30*130)/100
x = 39
You should be able to do the rest..just follow my examples. Hope I helped! :)
1. 20% of 7
20/100 = x/7
Solve for x by cross multiplying.
7*20 = 100x
x = (7*20)/100
x = 1.4
6. 130% of 30
130/100 = x/30
x = (30*130)/100
x = 39
You should be able to do the rest..just follow my examples. Hope I helped! :)
2008-07-22 12:20 am
use calculator......zzzzzzzz u can use the calculator in the start menu
2008-07-22 12:24 am
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1)1.4
1)1.4
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