Question

) Increase 250 in the ratio 7:5. (ii) Decrease 440 cm in the ratio 8 :11.
please help me​

Answer 1

Answer:

(1)The increase is 40%.

Step-by-step explanation:

Given : Increase ₹250 in the ratio 7:5.

To find : What is the increase?

Solution :

Let us consider x be the number,

According to question,

x : 250

= 7:5x:250

=7:5

Cross multiply,

5x=250\times 75x=250×7

5x=17505x=1750

x=1750/5

x==350

Increase in amount is x-250=350-250=100.

Converting into percentage,

\frac{100}{250}\times 100=40\%

250

100

×100=40%

Therefore, The increase is 40%

Cross multiply,

Answer 2

Increase 250 in the ratio 7:5.

250/7:5= 350