Jeff put 1/6 into his bank. You first make the fractions into common denominators. The nearest number that works would be 15. 1/3 changes into 5/15, 1/2 becomes 7.5/15.
7.5/15 + 5/15 is 12.5/15. Simplified is 5/6.
6/6 minus 5/6 gives you 1/6, therefore the answer is 1/6. Hope this helps!