Not entirely sure what you mean; but 45 is equal to 45, and to no other number.
45 is the same as 45.0
It's not the same. .45 LC (long colt) and .45 Mag are not the same.
A set of five numbers, the second to fifth of which are the same.
45% is the same as .45 and 45/100 (this can be simplified to 9/20)
45+45+45 = 135
-137-45 = -182 (-137 - 45) is the same as (-137 + -45), which is the same as -(137+45)
The number 45 is the same as 45/1, therefore you can change 45 to a fraction of 45/1.
.45 auto and .45ACP are the same round.
0.7 is larger than .45 which is the same as 0.45
45 x 1/3 is the same as 45/3, which equals 15.
45
it is the same.
20% is the same as 0.20 and 0.20*45 = 9