## 51. If (x + 20)% of 250 is 25% more than x% of 220, then 10% of (x + 50) is what percent less than 15% of x?

## 52. The ratio of expenditure to savings of a woman is 5 : 1. If her income and expenditure are increased by 10% and 20%, respectively, then find the percentage change in her savings.

## 53. A is 80% more than B and C is $$48\frac{4}{7}\% $$ less than the sum of A and B. By what percent is C less than A?

## 54. Rohit's income is Rs. 32000. If his expenses is 30 percent of total income, then what will be the saving of Rohit?

## 55. The price of petrol shot up by 5%. Before the hike, the price was Rs. 82 per litre. A man travels 3045 km every month and his car gives a mileage of 15 km per litre. What is the increase in the monthly expenditure (to the nearest Rs.) on the man's travel due to the hike in the petrol prices?

## 56. If each edge of a cube is increased by 10% then the percentage increase in its surface area is:

## 57. If the numerator of a fraction is increased by 15% and denominator is decreased by 20%, then the fraction, so obtained, is $$\frac{{17}}{{65}}.$$ What is the original fraction?

## 58. In a two-candidate election, 10% of the voters did not cast their ballots. 10% of the votes cast were found invalid. The winning candidate received 54% of the valid votes and a 1620-vote majority. Find the number of people on the voter list who have registered to vote.

## 59. If the sum of 40% of a number and 30% of the same number is 70, then the number is:

## 60. Two candidates P and Q contested in an election. 70% of the registered voters are P supporters. If 60% of the P supporters and 30% of the Q supporters are expected to vote for candidate P, then what percentage of the registered voters are expected to vote for candidate P?

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