Denissa

Denissa has 18 9/10 kilos of bananas to sell if she was able to sell 15 ⅗. How many kilos of bananas were left?

Correct answer:

x =  3.3 kg

Step-by-step explanation:

$$\begin{gathered} a=18{\displaystyle \frac{9}{10}}=18+{\displaystyle \frac{9}{10}}={\displaystyle \frac{18\cdot 10+9}{10}}={\displaystyle \frac{189}{10}}=18.9\text{ kg } \\ b=15{\displaystyle \frac{3}{5}}=15+{\displaystyle \frac{3}{5}}={\displaystyle \frac{15\cdot 5+3}{5}}={\displaystyle \frac{78}{5}}=15.6\text{ kg } \\ x=a-b=18.9-15.6={\displaystyle \frac{33}{10}}\text{ kg}=3\frac{3}{10}\text{ kg}=3.3\text{ kg} \end{gathered}$$

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