Education > Complete treatise on practical arithmetic and book-keeping

248,
APPEND*:.-
Divide 363*5‘740’ by 48-3’.
Divide 9 by •4r5’.
Divide •] 269*3’ by 19-39’.
Divide 17-45’ by -84’.
Divide -34*740’ by ‘6’
Ans. 7-5‘2*
Ans. 19-8.
Ans. -006545.
- ■ Ahs. 20*.
Ans. -52*1’.
To increase or diminish a Number at a given rate per cent.
Add the rate of increase -to 100, or subtract the rate o
decrease from 10» ; then, as 100 to the sum or difference, st
is the given number to the increased or diminished number
Or to find the U'hole increase or decrease.
As 100 is to the rate, so is the given number to the in u
crease or decrease on it.
j F
Given the increased or diminished number to find the. origina i
number. ■ t
Add the rate of increase to 100, or subtract the rate o! I
decrease from 100; then, as the sum or remainder is t< 6
100, so is the given increased or diminished number to th<
original number.
Commission brokerage, insurance brokerage, interest foj t<
years, loss and gain, discount and exchange, are wrought ;
by these rules.
Required the commission on 758/ 13s 71rfi at 2| per cent
100 : 2^ : ; 758/ Ms 7id : 18/ 19s id the commission, s
Note. If the rate on 1001 be guineas, and ^ of the given sunt to Ji '
then proceed a$ if the rate were pounds.
Required the insurance on 1460/ at 4 guineas per cent
Aits, 61/ 6s i\d ",
20)1460
73
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32
20
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3
3
40
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