2194
ARITHMETIC
EXERCISE 32
1. What per cent of 325 is 25?
2. What per cent of 175 is 125?
3. A lot of land costing $1620 was sold for $1863. What was the gain per cent!
4. I bought a farm for $5500, and paid $1200 for repairs. I sold the farm for $7839. What per cent did I gain!
5. An agent received $1360 for collecting a bill of $8500. What was the rate per cent?
III. To find a number when a percentage of it is given. $450 is 75% of what sum?
A.
600.
.75^)450.00^ 450
00 or
450 =75%
B.
75% = 34 450 = %
450
1 = £ of 450 = 150 1 — 4X150 =600 or
1 50
100% = 100 X TV °f 450 23^FLJI =
8 •4-frtr * 10 0 ___ fiAfl
—— — bUU
Rule. To find a number when a percentage of it is given, divide the given percentage by the rate per cent, expressed either as a decimal or as a common fraction.
EXEECISE 33.
1. 675 T. is 60% of how many tons?
2. 118 bu. is 25% of how many bushels?
3. $75 is |% of what number of dollars?
If 75 = %%, 150 = 1%.
100%, or the whole, = 150 X 100 == $15000.
4. $75 is 16|% less than what amount?
16f % less = 831%.
$75 is 83|% of what amount?
Or $75 = f of what amount ?
5. 1860 yd. are 50% more than what amount of yards?
50% more = 150%.
1860 = 150% of what number!
