Correct option is A
Given:
25 percent of a number when subtracted from 100.
Solution:
Let the number be x.
100 - x × 25% = x
=> x + 0.25x = 100
=> 1.25x = 100
=> x = 80
Alternate Solution:
Let the number be 100x.
100 - 25% × 100x = 100x
=> 100 - 25x = 100x
=> 100 = 125x
=> x = 100/125
=> 100x = 80