Percents and ratio

When 20% of a number is added to another number, the number increases by 50%. What is the ratio of the two numbers?

Correct answer:

r =  5:2

Step-by-step explanation:

r1=20%=10020=51=0.2 r2=50%=10050=21=0.5  r=a:b = a/b  r1 a+b= b+ r2 b r1 a= r2 b  a/b = r2/r1  r=r2/r1=0.5/0.2=2.5=5:2



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