the common denominator is the number on the bottom of the fraction. in this case it would be 4 (in 3/4) and 3 (in 2/3), you have to find a number which equals the same for both! so 3 and 4 both go into 12. 3 × 4 and 4 × 3, so you common denominator is 12! but, you also have to multiple the same number up on the top number. so 3 × 3 and 2 × 4. Then you Add! but only the top numbers! you can only add/subtract fractions that have the same common denominator! your answer will end up being the improper fraction of 17/12. if you have to turn it into a decimal or make it proper, then do so ^^
to find a common denominator, you have to find the number which both numbers equally go into! so no decimals. check the times tables!
Answer:
9 horses i think
Step-by-step explanation:
24/8 = 3
3*3 = 9
Answer: 39 students.
Step-by-step explanation: 1/5 of 75 is 60. Now we need to find out what 3/5 of 60 is. 3/5 times 60 = 39. 39 students need to give their speeches.
Answer:
9 miles
Step-by-step explanation:
use Pythagoras theorem
15 squared - 12 squared = 81
square root of 81 is 9
Answer:
14 ft
Step-by-step explanation:
The perimeter of the pen Christina first decide to make is;
Perimeter = L + L+ W + W
= 6 ft + 6 ft + 11 ft + 11 ft
=34 feet
Now she wants the width to be only 3 ft and the perimeter to be the same.
34 ft = L + L + 3 ft + 3 ft
34 ft = 2L + 6 ft
subtract 6 ft from both sides of the equation to give you;
28 ft = 2L
Divide both sides of the equation by 2 to give you;
L = 14 ft