I remember when decimalisation came in . I had my pocket money worked out to the (old) penny to include my weekly magazine and sweets. As usual I headed to the newsagent to pick up that week's edition, handed over my old money and got my change in decimal. Sadly the conversion meant that this was 'rounded down' . It could only have been marginal but I was so angry and moaned endlessly to my parents about how unfair it was ( I was a teen....moaning was my default position)... to no avail. Some recalculations were needed. Valuable lesson on how to budget for unexpected expenses learnt!