With or without a calculator, and if with, is it one with a % button? If with, it's a question of reading the manual :-)
Assuming without, it's only a question of knowing what a percentage means and doing the arithmetic:
37 1/6 % of 45 means ((37 1/6) / 100) x 45
and then it depends on whether you need it exactly or approximately. In real life, I'd say that's a wee bit more than one third of 45 or 15 and a bit more :-) The hard way, well, 37 1/6 is 223/6 isn't it, and we can cancel 5 between the 100 and the 45 and 3 between the 6 and the 45, leaving:
(223/(2x20)) x 3 = 669/40 = whatever it does equal, um, 16 and 29/40
Does that help?
