Question

6 If 20% of a = b, then b% of 20 is the same as: A) 4% of a B) 5% of a C) 20% of a D) None of these???​

Answer 1

If 20% of a = b, then b% of 20 is the same as

Answer: A) 4%

Solution:

• 20% of a = b
• a X (20/100) = b
• a X (1/5) = b
• a:b=5:1

Now,

• We know the value of a and b that is 5 and 1 respectively.
• Let us assume b% of 20 is same as x% of a

Then,

• 20 X (1/100) = 5 X (x/100)

Therefore,

• x = 20/5
• x = 4 %

Thus, 20% of a = b, then b% of 20 is the same as 4%