Nathan convert 5/10 to a repeating decimal and write 0.45 as the answer. what error did he make?

Question

what error did he make please i need help i need the right answer

Answer 1

5/10 = 0.50000,,,,,

0.45 = 0.450000....

5/10 = 10/20, .45 = 45/100 = 9/20. The answer is off by 1/20 or 0.05, not much, close, but no cigar. Still, rather close. Relatively.