(i) Converting the given decimals into like decimals, we get:
7.40, 8.34, 74.40, 7.44, 0.74
Clearly, 74.40 > 8.34 > 7.44 > 7.40 > 0.74
Hence, the given decimals in descending order are 74.4, 8.34, 7.44, 7.4 and 0.74.
(ii) Converting the given decimals into like decimals, we get:
2.600, 2.260, 2.060, 2.007, 2.300
Clearly, 2.600 > 2.300 > 2.260 > 2.060 > 2.007
Hence, the given decimals in descending order are 2.6, 2.3, 2.26, 2.06 and 2.007.