Correct option is A
Given:
20% of a number added to 72 results in the number itself.
Solution:
Let the required number be x.
According to the given condition:
× x + 72 = x
0.2x + 72 = x
72 = x - 0.2x
72 = 0.8x
x =
x = 90
Now, we need to find 70% of the same number:
70% = × 90
= 0.7 × 90
= 63
Final Answer
So the correct answer is (a)