Question

A cake has a mass of 2.5kg. It contains 275g of fruit. What percentage of fruit is there in the cake

Answer 1

The answer is:  "11 %" . 
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There is 11% of fruit in the cake.
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Explanation:
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275g is what percent of 2.5 kg?  

First, convert "275 g" into "kg".

Note the exact conversion:  1000 g = 1 kg .  

So 275 g = (275/1000) kg  = 0.275 kg .


0.275 kg = (n/100) * 2.5 kg ; 

→ (n/100) * 2.5 = 0.275 ;
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Divide each side by "(2.5)" 
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→ (n/100) = (0.275) / (2.5) ;

→ (n/100) = 0.11 ;

Multiply each side by "100" ; 

n = 11 . 
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The answer is:  11 % .
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Answer 2

275g=0.275kg
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2.5kg———100%
0.275kg—x.
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2.5•x=0.275•100
2.5x=27.5
x=11%