Upvote:1
Presuming that's the annual rate, which the most common way for inflation to be expressed, that means that the average price of goods will be average 60% higher in one years time.
Meaning, something that costs $1 on 01 JAN will cost $1.60 31 DEC. When prices actually increase is dependent on the merchants. In this case, merchants would raise their prices by ~$0.01 per week to keep up with inflation. Which translates to average 1.1% per week.
So, over the course of two months, you might see price increases of 10-15%, but maybe not. There's lots of seasonal factors involved as well.
When to change money is entirely based on you comfort with the risk of a possible ~10% price increase. And keep in mind, it's likely many exchanges can be performed using Dollars, Pounds or Euros.
I will say that changing many small amounts is likely to incur fees significantly greater than even a 60% inflation rate.