# Business MathCurrency Conversion

#### Hobo5

##### New member
Sir,
Would anyone be able to help me with converting the UK decimal currency amount of £0.91 to £ s d
Thank you in advance,
Regards,
P.N.

#### Olinguito

##### Well-known member
In the pre-decimal currency of the UK, there were 12 old pence in one shilling and 20 shillings in one pound; thus there were 240 old pence in a pound. (Note that the symbol for the old (pre-decimal) penny is d whereas p is the symbol for the new (decimal) penny.)

If $x$ is the amount of old pence corresponding to 91 new pence, then
$$\frac x{240}\ =\ \frac{91}{100}$$
giving $x=0.91\times240=218.4$.

$218.4\ =\ 18\times20+2.4.$

Hence $£0.91\ \text{(decimal)}\ =\ £\mathrm{0\,\,18\,s\,\,2.4\,d}\ \text{(pre-decimal)}$.

#### Wilmer

##### In Memoriam
EASIER if you do what we did here in Canada:
eliminate the **** penny!!

#### Klaas van Aarsen

##### MHB Seeker
Staff member
EASIER if you do what we did here in Canada:
eliminate the **** penny!!
Don't you have the problem that you don't know how many dollars there are in a dollar?
Easier if you do what we did here in Europe: only one Euro. 