percentage
posted by Da S .
Choon yong was asked to paint a wall of area 84 meter square.In one hour,he had painted 21meter square.
a)what percentage of the wall was left unpainted?

I've done two for you above. You should have the idea by now.
Respond to this Question
Similar Questions

math
paint express charge $30 per gallon of paint plus $1.10 per square foot of wall space. color creations charges $24 per gallon of paint plus $1.20 per square foot of wall space. robert estimates he will need four gallons of paint for … 
math
a student is painting one wall of a room. a square window is located in the middle of the wall to be painted. the window measures 3 feet on one side. the area of the wall, not including the window, is 80ft squared. find the height … 
Algebra1
the area of a wall is 15 square feet. if i can paint 180 sq inches per hour how many hour will it take me to paint the wall. 
math
a+boundary+wall+of+your+house+is+divided+in+to+10+vertical+strips+of+equal+width+you+painted+4+strips+of+wall+with+pink+3+with+yellow+and+3+strips+with+green+paint+find+the+percentage+area+of+wall+painted+with+pink+colour 
math
A wall has an area of 7.2 square meter. It was painted yellow and brown. The area of the wall painted yellow was 3 times as large as the area painted brown. What was the ratio of the area painted yellow to the area painted brown? 
math
a square foot of wall space needs 1/8 quart of paint. terrence has 7 quarts of paint, but uses 2 quarts to paint a pipe. how many square feet of wall can he paint with the rest of the paint? 
Algebra
paint express charge $30 per gallon of paint plus $1.10 per square foot of wall space. color creations charges $24 per gallon of paint plus $1.20 per square foot of wall space. robert estimates he will need four gallons of paint for … 
Math
Erica painted all but 6 square feet of a wall in the shape of a square. How many square feet of the wall did she paint? 
Math
Erica painted all but 6 square feet of a wall in the shape of a square. How many square feet of the wall did she paint (below) What is this situation in an algebraic expression? 
Math
Erica painted all but 6 square feet of a wall in the shape of a square. How many square feet of the wall did she paint What is this situation in an algebraic expression?