To find what times what equals 7.5, we need to factorize 7.5. The prime factorization of 7.5 is 2.5 x 3. Therefore, the numbers that multiply to give 7.5 are 2.5 and 3. So, 2.5 times 3 equals 7.5.
Well, darling, 2 times 3.75 equals 7.5. But you could also have 1 times 7.5, or even 15 times 0.5. Math can be a real hoot when you play around with it!