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20% of a number is 60

When 20% of a number is added to another number the number increases by 50%. What is the respective ratio between the first and the second numbers?

When 40% of a number is added to 42, the result is the number itself. The number is :

50% of a number when added to 50 is equal to the number. The number is

When 30 percent of a number is added to another number the second number increases to its 140 per cent. What is the ratio between the first and the second number?

20% of a number when added to 20 becomes the number itself, then the number is