familiar situation with AK

[hetron]

How often do u guys have a situation like this arise?

2-5nl

You have $300 in front of u


Early position raiser (stack 500) raises to 30. I reraise to 60 with AK. Folded all around. He reraises all in.

What does the percentage of the money in the middle have to be compared to my stack to make this a viable call (consider in this case, the money in the middle $120, is 50% of my now $240 bucks remaining). Limited information on the all in reraiser, but has appeared fairly straightforward in all situations noted so far.