rather than 48:0.4, or 48:(2/5), you could switch division to multiplication by switching the location of the numerator and denominator, so:
48 * 5/2 =240/2 = 120.
Or, just know that 48:1 is 48, and 0.4 times 2.5 is 1, therefore 48 times 2.5= 120.
12
48 divided by 8 is 6 and 8 divided by 48 is 0.1 reoccurring 6
1 divided by (1/48) = 48
48 divided into 1218 = 0.03940886699507389
48 divided by 3.14 is ~15.29
3
34
0.0141
143.5833
0.0495
0.0521
0.375
140