9/20=0.45; 7/40=0,175; 11/400 =0,0275; 21/168=0,125; 35/280=0,125; 47/376=0,125
9/20 = (9*5)/(50*5) = 45/100 = 0,45
7/40 = (7*25)/(40*25) = 45/100 = 0,175
11/400 =(11*25)/(400*25) = 275/10000 = 0,0275
21/168 = (21:21)/(168:21) = 1/8 = (1*125)/(8*125) =0,125
35/280 = (35:35)/(280:35) = 1/8 =0,125
47/376 = (47:47)/(376:47) = 1/8 =0,125
9/20=0.45; 7/40=0,175; 11/400 =0,0275; 21/168=0,125; 35/280=0,125; 47/376=0,125
9/20 = (9*5)/(50*5) = 45/100 = 0,45
7/40 = (7*25)/(40*25) = 45/100 = 0,175
11/400 =(11*25)/(400*25) = 275/10000 = 0,0275
21/168 = (21:21)/(168:21) = 1/8 = (1*125)/(8*125) =0,125
35/280 = (35:35)/(280:35) = 1/8 =0,125
47/376 = (47:47)/(376:47) = 1/8 =0,125