How do you find the ratio of a to b in lowest terms if #a= 12# cm and #b= 84# cm?

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Answer 1 · 2015-04-03T00:25:48

The ratio of #a:b# is #1# cm #:7#cm.

Given #a = 12# cm and #b = 84# , the ratio #a:b# would be
#12#cm : #84#cm

Dividing both sides by #12# gives us:
#1#cm #:7#cm

Answer 2 · 2015-04-03T00:27:54

Try to divide both by the same number

#a/b = 12/84=# (divide both by 12 and you get) #=1/7#

You can do this step by step if you're not good at your multiplication tables (we'll do 2-2-3):

#a/b =12/84 =6/42=3/21=1/7#