The answer to this question is actually quite simple. To convert FD to EF, you just need to multiply the numerator by 2 and divide the denominator by 3. So, if you have an FD of 12/24, you would just multiply the numerator (12) by 2 and then divide the denominator (24) by 3, which would give you an EF of 8/16.
It's important to note that when converting from one scale to another, you always want to make sure that your units are consistent. So, in this case, since we're dealing with fractions, it's important to make sure that both the FD and EF are expressed as fractions with the same denominator. If they didn't have the same denominator, we wouldn't be able to accurately compare them.
Hope that helps!