Teacher:Given a math problem with context and a question and 5 answer choices, the task is to provide the correct answer choice based on the problem. You must choose one of the given answer choices by letter: a, b, c, d, or e; anything else is invalid.
Teacher: Now, understand the problem? Solve this instance: Problem: if 40 % of a number is equal to two - third of another number, what is the ratio of first number to the second number.
Options: a. 5: 3, b. 2: 5, c. 4: 7, d. 5: 2, e. none of these
Student:
a