1). 28 * 1/2 = 14 * 1 = 14
2). 28 * 3/7 = 4 * 3 =12
3). 28 * 9/12 = 7 * 9/3 = 63/3 = 21
4). 28 * 19/28 = 1 * 19 =19
28/2*1=14
28/7*3=12
28/14*9=18
28/28*19=19
1). 28 * 1/2 = 14 * 1 = 14
2). 28 * 3/7 = 4 * 3 =12
3). 28 * 9/12 = 7 * 9/3 = 63/3 = 21
4). 28 * 19/28 = 1 * 19 =19
28/2*1=14
28/7*3=12
28/14*9=18
28/28*19=19