What Is Meant By Expressing A Fraction In Lowest Terms?

This means to simplify the fraction as much as possible by using greatest common factors.
For example:
4/8 is not expressed in lowest terms because 4 goes into both 4 and 8. So you just divide the numerator (top) and denominator (bottom) both by 4 and you are left with 1/2.

A fraction in lowest terms would be like 2/4 would be 1/2 or 48/100 would reduce to 24/50 which goes to 12/25 which is the lowest term.

Please help wats 55% as a fraction expressed in lowest terms ?? X