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Answer»

Let total amount required for car = xSaving every month should be equal to x/12

To buy car in 9 months saving should be x/9

So % increase in saving should be = [(x/9 - x/12)/(x/12)]*100= [(4x - 3x)/36/(x/12)]*100= (12/36)*100= (1/4)*100= 25%

33.3



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