The digits of a two-digit number sum to 8. when the digits are reversed, the resulting number is 18 less than the original number. what is the original number?
a.26
b.35
c.53
d.62

Ok, so one way to do this is to try the options (since we are given options)
we see that all of them are equal to 8 when added

now compare the reverses
well the original number has to be greater than the reversed number so therefor A is the reverse of D and C is the reverse of B

so see C and D

53-35=18
62-26=36

the original numer is 53

C is answer

The percent increase is 25%