I think it is June. June is the longest day/
Explanation:
its either a or d however i say the best choice is d
Answer:

I'm just in jss2 but I read physics. this is what I think
The decimal point is placed after two digits starting from the end. For each decimal place, we can write the number divided by 100.
21.12 can be written as
.
Divide the numerator and denominator by 2:

The numerator and denominator can be divided by 2 again:

There is no other common factor between numerator and denominator other than 1. Hence, it is the reduced form.