maths
posted by kelly .
simn spent 2/5 of his pocket money on a computer game
he spent 25% of his money on a ticket for a football match
what is the fraction of his pocket money that he had left

25% = 1/4
1/4 + 2/5 = 5/20 + 8/20 = 13/20 
Kelly, Sarah or Holly, I lost track, I guess so did you.
All you need to do now is to subtract 13/20 from 100% to get what's left. 
1/3 equals to 4/12, 1/4 equals to 3/12.
3/12 plus 4/12 equals 7/12. Therefore 5/12 left