An employee spends 20% of his salary on rent. From the remaining amount, he gives 10% to his grandmother. Then, he spends 30% of the remaining amount ...
Question
An employee spends 20% of his salary on rent. From the remaining amount, he gives 10% to his grandmother. Then, he spends 30% of the remaining amount on food. The rest of the salary is saved. What is the ratio of his savings to his total expenditure?