Question

A man's age is 125 percentage of what it was 10 years ago but

Answer 1

Let the age before  10  years  =  x . Then,

$\frac{25x}{100} = x+10 --> 125x = 100x + 1000 --> x = \frac{1000}{25} = 40$

Present age =  x  +  10 =  40  +  10  =  50