The ratio of hydrogen to oxygen in compounds

Hydrogen and oxygen make two compounds: water, with a mass ratio of $1 : 8$, and hydrogen peroxide, with $1 : 16$. You will make the program find the percentage of hydrogen in each, the oxygen in $50\ \text{g}$ of hydrogen peroxide, and how many times as much oxygen hydrogen peroxide has for the same mass of hydrogen. Then it draws the percentages.

The idea. In a compound the ratio is fixed. With a ratio $h : o$, hydrogen is $\dfrac{h}{h + o}$ of the mass.

Your tasks.

1. Inside the loop, work out pc, the percentage of hydrogen in each compound.
2. Find oxygen50, the grams of oxygen in $50\ \text{g}$ of hydrogen peroxide.
3. Find times, the oxygen in hydrogen peroxide divided by the oxygen in water, for $1\ \text{g}$ of hydrogen.