Answer:557/100
Step-by-step explanation: 557 can be split into two parts: whole number(5) and decimal fraction(0.57). Therefore by expansion:
5.57=5 + 0.5 + 0.07 i.e five + five tenths + five hundredths
= 5 + 5/10 + 7/100 = 5 + (5/10 + 7/100) = 5 + 57/100 = 557/100
Both numerator and denominator have no common factor. Hence, the resulting fraction cannot be simplified further.