takinfromindians97 said:
It seams like such a hassle to convert to a TC is there any way to make it easier.
No. Learn how to divide integers in your head, it's a general skill.
If you can't divide by non-integers very easily (e.g. 17 divided by 3.5), you can use one of several forms of estimation:
(1) Upper/lower bound. Divide your RC by 3. Divide your RC by 4. Dividing by 3.5 will be between those two numbers. So if you have a RC of +17, dividing by 3 is about 6 (18/3 = 6), dividing by 4 is about 4 (16/4 = 4), so dividing by 3.5 will be about 5 (in actuality it's 4.86).
(2) Multiplication tables. Memorize your 1.5, 2.5, 3.5, 4.5, 5.5, and 6.5 tables. 3.5 x 1 = 3.5, 3.5 x 2 = 7, 3.5 x 3 = 10.5, 3.5 x 4 = 14, 3.5 x 5 = 17.5, so 17/3.5 will be just less than 5.
(3) Integer-izing. Multiply both your top and bottom by n to get integers, where n is the fraction of a deck that you estimate to (so for half-deck estimation n = 2, quarter-deck estimation n = 4). 17/3.5 = (17*2)/(3.5*2) = 34/7 = 4 6/7.