In order to compare, let's bring them to the same form:
I choose a fraction.
\(\frac{7}{8}\) and \(\frac{78}{100}\)
I'll bring them to a common denominator: 400
\(\frac{7*50}{8*50}\) and \(\frac{78*4}{100*4}\)
\(\frac{350}{400}\) and \(\frac{312}{400}\)
and now we just need to compare 350 and 312: 350 is bigger, so 7/8 is bigger!