29 You just have to use your times tables. 45 divided by 5 = 9
and 100 divided by 5 = 20
20+9=29
145
0.0345
5
145 divided by 7 equals 20 with a remainder of 5.
29
5
725
9.6667
145 = 29 x 5, and also of course 145 = 145 x 1, so you can divided 145 into5 groups of 29, or29 groups of 5, or145 groups of 1, or1 big group of 145
4.2647
152
0.3103