132 • ARITHMETIC. 



RULE.* 



Find the value of that commodity, whose quantity is giv- 

 en ; then find what quantity of the other,' at the rate pro- 

 posed, you may have for the same money, and it gives the 

 answer required. 



EXAMPLES. 



I. How many dozen of candles at 5s. 2d. per dozen, 

 must be given in barter for 3cwt. 2qrs. of tallow at 37s, 

 4d, per cwt. ? 



62 130 



12 



62)1568(25 

 124 



328 

 310 



18 

 12 



62)216(3 

 186 



Ans. 25 doz. and 3. — » 



30 2, How 



This rule is evidently, only, an application of the rule pf three. 



