To switch from percentages to decimals, divide the percentage by 100, 1 1/100 = .11. You can also move the decimal point two places to the left.

Find out how many rooms Lacey can clean in one hour and add it together with how many rooms Maria can clean in one hour. The total time to clean is 1 hour = 60 minutes.

Lacey can clean 4.29 rooms, 6844 = 4.29.

Maria can clean 3.16 rooms, 684a = 3.16.

When you add their efforts together they can clean 7.45 rooms, but because it asks for complete rooms, you must round down to 7 rooms.

Use the conversion to calculate; if 1 lb = 16 oz, then multiply 34 by 16 to find the total number of 544 oz, 34 x 16 = 544. If each nail weighs 1 oz, there are 544 nails in a 34 lb box.

A circle will provide the largest area. In order to find the area of the circle, you must find the radius using the circumference
(perimeter), which is 12.73 ft,
C = 3.14x2xr,80 = 3.14x2xr;
r = 12.
73. The area of a circle is calculated by A=3.14r(2), giving a total of 509.8 sq. ft. If a square shape were built, the sides would be 20 x 20 (8% = 20) giving an area of only 400 sq. ft., 20 x 20 = 400. Playing around with numbers for a rectangle will show that the area would not be able to exceed the circle.

Find the area of the four walls. Two of the walls are 15 feet by 8 feet. The other two walls are 12 feet by 8 feet; 15 x 8 = 120 square feet; 12 x 8 = 96 ft2. The total area of the walls in the room is 120 +120 + 96 + 96 = 432 square feet. Next, find the number of gallons of paint that must be purchased. Each gallon covers 300 square feet, so two gallons will be needed. Last, calculate the cost of those two
gallons of paint; 2 x $25.50 = $51.00.

This is a problem disguised with confusing information. The 2:5 ratio must be held in a proportion similar to this, where x represents the real height of the house: 2/5 = 10.2/x;2x = 51;x= 25.5

There are 3.8 L per 1 gallon. To figure out how many liters Teresa will need for her mix, convert gallons to liters by multiplying 13 gal x 3.8 L/gal = 49.4 L.

There are 14 stairs with a ratio of 3:7. The total depth is 210 in, 14 * 15 = 210 and using a simple proportion will help find the height. 3/7 = x/10;
7x = 3(210); (7x)/7 = 630/7;x= 90.
90 inches is the same as 7.5 ft, 9°/iz = 7.5.

The water heater is marked up 15% from $1,850, $1,850x 1.15 = $2,127.50,
and then discounted 25%, $2,127.50 x 75 = $1,595.63. The last piece is to add the tax, $1,159.63 x.065 = $103.72, To the total price, $1,595.63 + $103.72 = $1,699.35.

The first cleaner costs $2.75 for 44 ounces. Since the cost per ounce is needed, divide $2.75 by 44 to get about $.0625 per
ounce, or about $.06 per ounce. The second cleaner costs $3.70 for 55 ounces;

$3.70 + 55 = $.067 per ounce,

or about $.07 per ounce. Therefore, the first cleaner is the better buy because it is cheaper per ounce.

If there are 100 centimeters in 1 meter, than to find how many centimeters are in 10 meters, multiply 100 by 10; 100 cm/m x 10 m = 100 centimeters.

In order to find out how many hours she worked, divide the total amount paid by the hourly wage, 90/15 = 6; 6 hours.

There are 12 months in a year and $68.50 is held each month for the government. To find the total for the year, multiply the cost
each month by 12 to represent an entire year: 12 x $68.50 = $822.

The tank was 2/5 empty, which means it was % full, 1-2/5 = 5/5-2/5 = 3/5. 3/5 of the total capacity is equal to 310 gallons so the capacity of the tanker is 516.7 gallons.

(3/5)x = 310

= 310x5/3,x = 516.7.

The first stop took 2/9 of the original 310 which means 241.1 gallons remain, 2/9 x 310=68.9.

The next stop took 1/3 of the remaining 241.1 gallons, resulting in 160.7 gallons left over, 1/3 x  241.1 =80.4 =160.7.

For the fill up at the end, the truck will need 356 gallons, 516.7-160.7 = 356.

Subtract 10% of the original price, p, from the original price. To find 10% of the original price, multiply the decimal equivalent of 10%, 0.10, by the original price, p, 0.10p. Subtract this amount 76. from the original price, p - 0.1 Op.