Question: what is 45 in its simplest form?
Answer: 45% is 0.45/100. For me, it's easiest to just multiply the numerator and denominator by 100 to get rid of the decimal, giving me 45/10,000. Dividing the numerator and denominator by 5 give 9/2000, which is in simplest form. If you mean 45%, that's 45/100.