## 51. Find the : (550% of 250) ÷ 275 = ?

## 52. By how much percent is four-fifths of 70 lesser than five-sevenths of 112 ?

## 53. The firm uses the following function to calculate the production out (PO) : PO = 5.3C^{2} L^{15}, where C = capital invested and L = labour employed. If the capital invested (C) increases by 20 percent, the change in PO will be :

^{2}L

^{15}, where C = capital invested and L = labour employed. If the capital invested (C) increases by 20 percent, the change in PO will be :

## 54. On a test consisting of 250 questions, Jassi answered 40% of the first 125 questions correctly. What percent of the other 125 questions does she need to answer correctly for her grade on the entire exam to be 60% ?

## 55. Find the 92.5% of 550 = ?

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