## 91. 80% of a number is equal to the $$\frac{{\text{4}}}{{\text{5}}}$$ th of the other number. what is the ratio between the first number and the second number respectively ?

## 92. The monthly salaries of Pia and Som are in the ratio of 5 : 4. From her monthly salary, gives $$\frac{{\text{3}}}{{\text{5}}}$$ to her mother, 15% towards her sister's tuition fees, 18% towards a loan and she shops with the remaining amount, which is Rs. 2100. What is the monthly salary of Som ?

## 93. Two bottles contain acid and water in the ratio 2 : 3 and 1 : 2 respectively. These are mixed in the ratio 1 : 3. What is the ratio of acid and water in the new mixture = ?

## 94. In a colored picture of blue and yellow color, blue and yellow color is used in the ratio of 4 : 3 respectively. If in the upper half, half blue : yellow is 2 : 3, then in the lower half blue : yellow is =?

## 95. A bag has coins of 50 paisa, 25 paisa and 10 paisa in the respective ratio of 5 : 8 : 3 whose total value is Rs.144. Find the number of 50 paisa coins.

## 96. $$\frac{7}{5}{\text{of }}58 + \frac{3}{8}{\text{of }}139.2 =\, ?$$

## 97. A movie was screened for 3 days - Monday, Tuesday and Wednesday. The respective ratio between the number of spectators on Monday. Tuesday and Wednesday was 2 : 3 : 5 and the price charged for three days was in the respective ratio 2 : 3 : 4. If the difference between the amount earned on Tuesday and Wednesday was Rs. 8800. What was the total amount earned in all three days?

## 98. The numerator of a fraction is 3 more than the denominator. When 5 is added to the numerator and 2 is subtracted from the denominator, the fraction becomes $$\frac{8}{3}.$$ When the original fraction is divided by
$$5\frac{1}{2},$$ the fraction so obtained is:

## 99. The ratio of the incomes of A and B in 2020 was 5 : 4. The ratios of their individual income in 2020 and 2021 were 4 : 5 and 2 : 3, respectively. If the total income of A and B in 2021 was Rs. 7,05,600, then what was the income (in Rs.) of B in 2021?

## 100. The ratios of copper to zinc in alloys A and B are 3 : 4 and 5 : 9, respectively. A and B are taken in the ratio 2 : 3 and melted to form a new alloy C. What is the ratio of copper to zinc in C?

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