Calculate the mango mass as a percentage of the total mass of the mixed fruit.
Tom prepares a drink by mixing juice and water in the ratio $3:7$. He makes $1.4$ litres of the drink. Calculate how much juice Tom uses. Give your answer in millilitres.
The price of a fruit drink is directly proportional to the amount of juice it contains. A fruit drink containing $125\,\text{ml}$ of juice costs $\$1.50$. Calculate the price of a fruit drink containing $175\,\text{ml}$ of juice.
Kofi has a bag with nuts and raisins. The bag contains $285\,\text{g}$ of raisins. Nuts make up the remaining $62\%$ of the mass in the bag. Calculate the mass of nuts in the bag.
The mass of mixed nuts and seeds in a bag is $500\,\text{g}$, accurate to the nearest $10\,\text{g}$. The mass of nuts in the bag is $350\,\text{g}$, accurate to the nearest $5\,\text{g}$. Calculate the upper bound and the lower bound of the mass of seeds in the bag.