\fdO'^ - Old Forge Coal Mines

ARITHMETIC.
(QUESTIONS 76-167.)
(76) A certain per cent, of a number means so many
hundredths of that number.
25j^ of 8,428 lb. means 25 hundredths of 8,428 lb. Hence,
lb. Ans.
25;i of 8,428 lb. = .25 X 8,428 lb. = 2,107
(77) Here 1100 is the base and 1^ = .01 is the rate.
Then, .01 X 1100 = 11. Ans.
(78) ^^ means one-half of one per cent. Since 1^ is
.01, 1-* is ^
.005, for, L£15.. And .005 X »35,000 = *175.
^ -0 05
Ans.
(79) Here 50 is the base, 2 is the percentage,* and it is
required to find the rate. Applying rule. Art. 193,
rate = percentage -;- base ;
rate = 2-T-50= .04 or 4^.
Ans.
(80) By Art. 193, rate = percentage -^ base.*
As percentage = 10 and base = 10, we have rate = 10
^ 10 = 1 = 100^. Hence, 10 is 100^ of 10. Ans.
(81) (a) Rate = percentage -r- by
base. Art. 193.
As percentage = $176.54 and base = 12,522, we have
rate = 176.54 -h 2,522 = .07 = 7^.
2 5 2 2 ) 176.54
.07
Ans.
* Remember that an expression of this form means that the first
term is to be divided by the second term. Thus, as above, it means
percentage divided by base.