Write each statement as a proportion using fractions. a. 25 is to 75 as 50 is to 150. b. 40 is to 90 as 8 is to 18.

Part (a):
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The statement ⇒⇒⇒ 25 is to 75 as 50 is to 150
Can be written using fractions as following

25 : 75 = 50 : 150

∴
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Part (b):
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The statement ⇒⇒⇒ 40 is to 90 as 8 is to 18
Can be written using fractions as following

40 : 90 = 8 : 18

∴
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