Last week I ran accross this post How Memorizing “$19.05” Can Help You Outsmart the MTA and shared it on Facebook. A good friend of mine from my college days, Steven Su, saw it and worked out the math for those who already own the card and have some remaining balance. He wrote on his facebook status:
I started thinking, what if you’ve already bought a card with a leftover balance and you want to know how much to refill your card so that it’ll come out even? …
Credits to Steven Su for working out the math.