Cookie division

Mom baked a bowl of cookies. The son took two-fifths of the cookies and the daughter one-quarter of the rest. What part was left to the parents?

Final Answer:

x =  9/20

Step-by-step explanation:

a=152=51 552=5552=552=53=0.6 b=41 a=41 53=4 51 3=203=0.15  x=ab=53203=2012203=20123=209=0.45



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