Two digits on top, three digits on bottom:
10 / 999 = 0.01001001001 (repeats forever)
10 / 100 = 0.1
Answer: No.
.
Three digits on top, two digits on bottom:
999 / 10 = 99.9 (two digits left of decimal)
100 / 99 = 1.010101 (repeats forever) (one digit left of decimal)
Answer: No.