[…] @lbutlr on Twitter wrote to us after the episode aired, noting two things. First of all, he found a mistake in Bart’s math on his solution, and second of all he noted that some currencies have no decimal places at all. In fact, the two currencies that showed an error in math on Bart’s solution were both without decimals: Korean Won and Japanese Yen. In both cases, their conversion rate is very high as a ratio to US dollars (1180:1 and 110:1) respectively. Bart’s method of rounding only showed the error when converting to these high ratio currencies. Bart wrote up how he figured out the problem and how he solved it in a blog post on www.bartbusschots.ie/…