Question

Which is bigger
40% of 90 or
1/2 of 80?

Answer 1

1/2*80 is 40
40%*90
10%*90 is 9
40%*90 is 9*4 which is 36
so 1/2 of 80 is bigger

Answer 2

`40\%\cdot90=0.4\cdot90=36\\ (1)/(2)\cdot80=40\\\\ 40>36\\ \Downarrow\\ \boxed{(1)/(2)\cdot80>40\%\cdot90}`