Final answer:
To find two thirds of a number, multiply the number by 2/3.
Step-by-step explanation:
To find two thirds of a number, you need to first determine the number. Since one fifth of the number is 15, we can multiply 15 by 5 to find the whole number.
15 x 5 = 75
Next, to find two thirds of the number, you multiply the number by 2/3.
75 x 2/3 = 50
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