MADNESS!!!!!

Was doing "research" for a mathematics assignement, when I came across the following question. Any takers... for the record, the answer is 0.49. The question is easy, for me that is. But the most efficient method to solve it involves something I learnt only in F MATHS! This question was taken from a PSLE assignment book!??!!



Here is the solution. You will need to observe how to split each fraction up, that's the key step. The remaining part is just a lot of cancellation.