Percentages (Percentages, decimals and fractions)：練習問題

Convert \(2.5\%\) to a decimal.

A storage tank contains water. On Monday, \(\frac{2}{5}\) of the water was used. On Tuesday, \(25\%\) of the remaining water was spilled.
What decimal part of the original amount of water is still in the tank?

Team A won \(18\) out of \(25\) matches. Team B won \(75\%\) of their \(20\) matches. Which team has a higher winning percentage, and by how much?

What is the fraction \( \frac{9}{10} \) expressed as a percentage?

A box contains \(80\) chocolates. If \(15\%\) of the chocolates are dark chocolates, how many chocolates in the box are not dark chocolates?

Express the fraction \(\frac{9}{20}\) as a percentage.

A fruit seller had a batch of apples. She sold $$40\%$$ of them on Monday. On Tuesday, she sold $$ \frac{1}{3} $$ of the remaining apples. What fraction of the original batch of apples was left after Tuesday? Express your answer as a simplified fraction, and then convert it to a decimal.

A school has $$600$$ students. $$35\%$$ of the students participate in sports. Of the students who do not participate in sports, $$ \frac{2}{5} $$ are in the art club. How many students are in the art club? Express this number as a percentage of the total students, rounded to one decimal place.

Answer the following conversion questions:

a) Convert $$60\%$$ to a decimal.

b) Express $$0.25$$ as a fraction in its simplest form.

c) What is the fraction $$\frac{2}{5}$$ as a percentage?

A school library has $$1200$$ books. $$ \frac{3}{5} $$ of the books are fiction. Of the remaining books, $$40\%$$ are science books. How many science books are there in the library?