Divide 10 by 25, which would get you 4. Move the decimal over two to the left, because you wanted a percentage.
Jenny gave away 40% of the roses.
Knowing that 1 = 8/8
this means 5 = 40/8
1/4 = 2/8
add 40/8 + 2/8 to get 42/8
this means she will have 42 pieces of pie
