Hi,
You are absolutely correct.
You need to write it in decimal form.
Here are the answers
19) 5/11 = 0.4545 (Repeating decimal)
20) 6/10 = 0.6 (terminating decimal)
21) 4/11 = 0.3636363 (Repeating decimal)
22) 10/15 = 0.666667 (Repeating decimal)
Thank you :)