Percentage Practice Test 3 with solutions

Question : 20 of 40

Marks: +1, -0

A garden has 45 roses and 55 lilies. How many more roses must be planted so that 75% of the flower will be roses?

Solution:

Let x roses be added

∴{45+x}/{100+x}=75%=75/100

180 + 4x = 300 + 3x

x = 120

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