Paul spent

Paul spent 2/5 of his money on new shirts and a ½ of his money on new shoes. What fraction of his money has been spent? What fraction is still left?

Correct answer:

s =  9/10
l =  1/10

Step-by-step explanation:

$s=\frac{2}{5}+\frac{1}{2}=\frac{4}{10}+\frac{5}{10}=\frac{4+5}{10}=\frac{9}{10}=0.9$

$l=1-s=1-\frac{9}{10}=\frac{1\cdot 10}{10}-\frac{9}{10}=\frac{10}{10}-\frac{9}{10}=\frac{10-9}{10}=\frac{1}{10}=0.1$

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