James bought 4/5 kg of flour. He used 1/2 kg of it to bake some cakes and 1/4 of it to bake some cookies. How much four did he have left? Give your answer as a fraction in kilograms.
4/5 - 1/2 - (1/4)(4/5) =
4/5 - 1/2 - 4/20
4/5 - 1/2 - 1/5
3/5 - 1/2
6/10 - 5/10
1/10 kg was left
+36 
