Question

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Answer 1

Question :

A man got 10% increase in salary . If his new salary is Rs 1,54,000 , find his original salary .

Answer:

Rs 1,40,000

Step-by-step explanation:

Let the original salary be x .

Then the new salary is x + 10% of x .

⇒ x + 10/100 × x

⇒ x + x/10

⇒ ( 10 x + x )/10

⇒ 11 x / 10

New salary =1,54,000

⇒ 11 x / 10 = 1,54,000

⇒ x/10 = 14,000

⇒ x = 1,40,000

The original salary was Rs 1,40,000 .

Question :

On Sunday 845 people went to the zoo . On Monday 169 went . Find the % in decrease .

Answer :

Decrease = 845 - 169

= 676 .

Percentage = decrease / original × 100

⇒ 676/845 × 100

⇒ 4/5 × 100

⇒ 80

Hence the percentage is 80 % .

Answer 2

1) let the original salary be x

x+10%x=154000

x+10/100x= 154000

11x/10=154000

11x= 154000

x=154000/11

x=140000

ans is 140000

2) let d% be x

sunday people= 845

Monday people= 169

x=ov.-n.v/o.v×100

x= 845-169/845×100
x= 80%
ans is 80%

ans3,4,5 in pic
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