Answer:
B. 18:81
C. 12:54
Step-by-step explanation:
2 : 9
choice 9:2
9 / 2 = 4.5
2 / 9 = 0.22
4.5 does not equal 0.22 so NOT equivalent
choice 18:81
18 / 2 = 9
81 / 9 = 9
9 does equal 9 so this is equivalent
choice 12:54
12 / 2 = 6
54 / 9 = 6
6 does equal 6 so this is equivalent
choice 18:4
18 / 2 = 9
4 / 9 = 0.44
9 does not equal 0.44 so NOT equivalent
choice 20:45
20 / 2 = 10
45 / 9 = 5
10 does not equal 5 so NOT equivalent
check:
B. 18:81
2 x 9 : 9 x 9 = 18:81
C. 12:54
2 x 6 : 9 x 6 = 12:54
