Comparing by height

Ira is 1 2/5 m tall. Her mother is 4/5 m as tall as Ira. How many times is Ira's mother taller than her?

Correct answer:

n =  1 47 = 11/7

Step-by-step explanation:

I=152=1+52=51 5+2=55+2=57=152=1.4 m M=54+I=54+57=54+7=511=251=2.2 m  n=M/I=511/57=511:57=511 75=5 711 5=3555=711=174=1.5714

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