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Answer:
This is 20:18 = 70:63
Step-by-step explanation:
Let 20:x because we are finding a missing value.
Convert the ratios into fractions, we get:
[tex] \frac{20}{x} = \frac{70}{63} [/tex]
Use the butterfly method to solve for x.
[tex]70x = (20)(63)[/tex]
[tex]x = \frac{(20)(63)}{70} [/tex]
[tex]x = \frac{(2)(63)}{7} [/tex]
[tex]x = (2)(9)[/tex]
[tex]x = 18[/tex]
Subsitute back the value of x to 20:x=70:63
20:18=70:63
where the missing proportion is 18.