Answer:
21 > 12
21 is greater than 12.
81 ÷ 8 < 121 ÷ 11
81 ÷ 8 = 10.125
121 ÷ 11 = 11
Now, comparing them:
10.125 is less than 11.
27 ÷ 9 = 3
27 ÷ 9 is equal to 3
3=3
46 < 400 < 64600
46 is smaller than 400 and 400 is smaller than 64600
or
46 400 < 64600
46 400 is amaller than 64600