Question

1. 3 supra3 · 2 supra7 · 21supra18
2. 2supra7 ·4supra3 ·3supra ·1supra5

Answer 1

 1). 3/3 * 2/7 * 21/18 = 1 * 2/7 * 7/6 = 1 * 1/1 * 1/3 = 1/3 ;
 2). 2/7 * 4/3 * 1/5 = (2*4*1) / (7*3*5)=8 /105 ;