Hello from MrBillDoesMath!
Answer:
1/6
Discussion:
(1/16) / (3/8) = => 1/(1/a) = a!
(1/16) * (8/3) =
(8/16) * (1/3) = => as 8/16 = 1/2
(1/2) * (1/3) =
1/6
Thank you,
MrB
(1/10) / 1 = 3 / x.....1/10 m to 1 second = 3 m to x seconds
cross multiply
(1/10)(x) = (3)(1)
1/10x = 3
x = 3 / (1/10)
x = 3 * 10/1
x = 30 seconds <====
1,800 is your answer because 1,200/72=16.6666667 and 1,800/108=16.6666667.
Hoped I helped!
Option e: associative property of addition