10.5
7 divided by 2/3 = 7 x 3/2 = 21/2
x= 10.5 3/x = 2/7 so multiplying by 7 this is the same as 21/x =2. Multiply by x to get 21=2x. Divide by 2 to get 10.5 = x
You need to divide 3425 by 21 and 2/3 This is done by following the rule. "If you wish to divide by a fraction, turn it over and multiply instead". But we have to change the 21 and 2/3 into an "improper" fraction; that's the name for a "top heavy" fraction. So. changing 21 and 2/3 into thirds we have (21 x 3) + 2 = 65 thirds = 65/3 To divide by that, multiply by 3 over 65 instead So multiplying 325 x 65/3 we get 21125/3 = 7041 & 2/3
Divide by two and three. 2 x 2 x 3 x 3 = 36
1 x 21 3 x 7
(21 x 2,54) / 9 = 5,92666667
5
For 21, 3 and 7. For 12, 2 and 3.
Divide prime numbers into it until all the factors are prime. A factor tree can help you visualize this.18 Divide by two.9,2 Divide by three.3,3,2 Stop.2 x 3 x 3 is the prime factorization of 18.
144 Divide by two. 72,2 Divide by two. 36,2,2 Divide by two. 18,2,2,2 Divide by two. 9,2,2,2,2 Divide by three. 3,3,2,2,2,2 Stop. 2 x 2 x 2 x 2 x 3 x 3 = 144
11
720 Divide by two. 360,2 Divide by two. 180,2,2 Divide by two. 90,2,2,2 Divide by two. 45,2,2,2,2 Divide by three. 15,3,2,2,2,2 Divide by three. 5,3,3,2,2,2,2 Stop. 2 x 2 x 2 x 2 x 3 x 3 x 5 = 720