The answer depends on what you wish to change it to!
7.54
times by the little number like .420 is 80
Any kind of fraction becomes decimal notation if you divide the denominator into the numerator. Any decimal notation becomes a percent if you multiply it by 100.
3.88 is decimal notation.
The number IS in decimal notation!
0.536 notation decimal
decimal notation of 335 = 335.0
42.4 as decimal notation = 42.4
300 is already in decimal notation.
decimal notation of 3.159 = 3.159
It is already in decimal notation as 4.8
0.05 is already in decimal notation.