NOTATION AND NUMERATION. 231 



The rate per cent is 160-^800 or 20 per cent. 



The percentage is 800X-20 or 160 lbs. overrun. 



Percentage of overrun must not be confused with 

 per cent of overrun. Percentage is the result ob- 

 tained by multiplying the base (800 lbs.) by the 

 per cent (.20) of overrun. 



The per cent of overrun is obtained by dividing 

 the percentage (160) by the base (800), the total 

 butter fat. 



