Matthew123456: francois spent 20% of his savings on a bike and 15% of the remainder on a books. What percentage of his savings did he have left?
Let x be his savings.
0.2x was spent on a bike leaving him with 0.8x
0.15 of 0.8x = 0.12x was spent in books
Amount left = 0.8x - 0.12x = 0.68x
So he had 68% left.
+118725 
