Question

7/10 of your body is made of water. Is more than 1/2 body water? Explain.

Answer 1

yes, 7/10=0.7 1/2=0.5 
0.7>0.5
therefore, 7/10>1/2, therefore more than half of the human body is composed of water

Answer 2

Yes. Seven out of ten is more than half. Anything over 5/10 would be more than half and anything lower than 4/10 is less than half. Just try and think about what the denominator is when it's divided by two.