Oliver took $\frac{7}{10}$ hours to travel from his house to his office. After 8 hours of work, he traveled $\frac{3}{4}$ hours from his office to his house. How long altogether did Oliver travel on that day?

$???$ hours

Adam gave an urgent task to his 2 assistants, Sara, and Maria. Sara finished the task in $\frac{5}{6}$ hours. Maria finished the same work in $\frac{6}{5}$ hours. 

What is the difference between how long it took Maria and Sarah to do the same work?

$???$ hours

There is a bag of sugar in the storage room. The bag contained $\frac{4}{5}$ kilograms of sugar. The chef filled up an empty can with $\frac{1}{10}$ kilogram of sugar and then used $\frac{3}{20}$ of a kilogram of sugar for a cake. How much sugar was left in the bag?

$???$ kilogram

Each large biscuit weighs $\frac{25}{3}$ grams and each small biscuit weighs $\frac{31}{6}$ grams. What are the total weight of two large biscuits and one small biscuit?

$???$ grams

Two types of fish can be found in a small aquarium. The blue fish is $\frac{2}{15}$ feet long and the orange fish is $\frac{7}{10}$ feet long.

How long are the two fish together?

$???$ feet 

The coffee mug has a capacity of $\frac{4}{11}$ liter. If Sara pours $\frac{3}{22}$ liter of coffee into the cup, how much milk can be added to the same cup?

$???$ liter

The capacity of the two milk pitchers on the counter is $\frac{9}{10}$ liter each. One pitcher has $\frac{3}{8}$ of a liter of milk in it and the other pitcher has $\frac{5}{12}$ of a liter milk in it. How much milk is there altogether?

$???$ liter

The coffee shop also sells small bags of coffee beans. The bags come in two sizes: $\frac{4}{5}$ kilogram and $\frac{7}{12}$ kilogram. How much more coffee does the bigger bag have?

$???$ kilogram

An octopus weighed $\frac{5}{6}$ kilogram. After two weeks, its weight was increased by $\frac{3}{10}$ kilogram. But afterwards, it lost $\frac{1}{5}$ kilogram in weight as it was sick.

What is its current weight?

$???$ kilogram

Adam had an out-of-town company trip last week. Before the trip, he noticed that his car was $\frac{3}{4}$ full of gasoline. After the trip, the gas tank was $\frac{2}{9}$ full. What fraction of the gasoline in the car was used during the trip?

$???\$ of the gasoline was used