#160;Decrease: #160; 400 by 25% It can be 400(1 25100) 400× 34=300 ...

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Standard VII

Mathematics

Percentages

Decrease:i 40...

Question

Decrease:
(i) 400 by 25%

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Solution

Decrease:
$400$ by $25 %$
It can be $400 (1 - \frac{25}{100}) 400 \times \frac{3}{4} = 300$

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Similar questions

Q. How many grams of a 25% by mass solution of KOH should be added to 400 ml of water to prepare a 15% by mass solution?

Q. A consumer spends Rs. 400 on a good priced at Rs. 4 per unit. When the price rises by 25 percent, the consumer continues to spend Rs. 400. Calculate the price elasticity of demand by percentage method.

Q. solve:

\frac{20 \pm \sqrt{400 - 4 (5) (18)}}{2 (5)}

Q. How many grams of a 25% by mass solution of KOH to be added to 400 ml of water to prepare a 15% by mass solution?

Q. Observe the pattern and fill in the blanks.
2

\times

200 = 400 2

\times

300 = 600 2

\times

400 = 800
3

\times

200 = 600 3

\times

300 = 900 3

\times

400 = 1200
4

\times

200 = 800 4

\times

300 = 1200 4

\times

400 = 1600
5

\times

200 = 1000 5

\times

300 = 1500 5

\times

400 = 2000
6

\times

200 =____ 6

\times

300 =____ 6

\times

400 =____
7

\times

200 =____ 7

\times

300 =____ 7

\times

400 =____
8

\times

200 =____ 8

\times

300 =____ 8

\times

400 =____
9

\times

200 =____ 9

\times

300 =____ 9

\times

400 =____
10

\times

200 =____ 10

\times

300 =____ 10

\times

400 =____
11

\times

200 =____ 11

\times

300 =____ 11

\times

400 =____
14

\times

200 =____ 14

\times

300 =____ 14

\times

400 =____
15

\times

200 =____ 15

\times

300 =____ 15

\times

400 =____
25

\times

200 =____ 25

\times

300 =____ 25

\times

400 =____
27

\times

200 =____ 27

\times

300 =____ 27

\times

400 =____
39

\times

200 =____ 39

\times

300 =____ 39

\times

400 =____
48

\times

200 =____ 48

\times

300 =____ 48

\times

400 =____
50

\times

200 =____ 50

\times

300 =____ 50

\times

400 =____

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Decrease:(i) 400 by 25%

Decrease: 400 by 25%It can be 400(1−25100)400×34=300

Decrease:
(i) 400 by 25%

Decrease:
$400$ by $25 %$
It can be $400 (1 - \frac{25}{100}) 400 \times \frac{3}{4} = 300$