Question

1. Out of a salary of $4500, I kept 1/3 as savings. Out of the remaining money, I spend 50 % on food and 20 % on house rent. How much do I spend on food and house rent?

2. A certain school has 120 teachers. If this constitutes 30% of its workforce, find the number of employees in the school.

3. Rachael gets 94 marks in her exams. These are 47% of the total marks. Find the maximum number of marks.

4. A tank can hold 50 liters of water. At present, it is only 30 % full. How many liters of water shall I pit in the tank, so that it is 50 % full?

5. Pat's income is 20 % more than Adam. How much percent is Adam's income less than Pat's?

ANSWER ALL OF THEM ONCE
and
NO IRRELEVANT ANSWERS!!! ​

Answer 1

In this kind of math, you do things in order and you will be all fine.

First one is savings. Translate English to math:

"1/3 of Salary is savings"

The English word "of" translates to "multiply" in math. the English word "is" translates to "equal". Therefore

1/3 * $4500 = "savings"

So you know savings is $1500.

Of that $1500, 50% is food.

$1500 x 50% = "food"

$1500 x 0.5 = $750 = "food"

Of that $1500, 20% is rent.

$1500 x 20% = "rent"

$1500 x 0.2 = $300 = "rent"

The amount spent for food and rent are $750 and $250 respectively.

Wish you best,

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