Percent problems

Two circles are given. The radius of the first circle is by $30\mathrm{\%}$ longer than the radius of the other circle. It means that the area of the first circle is bigger than the area of the second one

The angle $\beta$ is by $25\mathrm{\%}$ less than the angle $\gamma$ and by $50\mathrm{\%}$ greater than the angle $\alpha$. The angle $\gamma$ is

One side of a rectangle was increased by $10\mathrm{\%}$. By how many percent has the area of the rectangle changed?

$30\mathrm{\%}$ of some goods were sold with a $15\mathrm{\%}$ profit and the remaining amount was sold with a $10\mathrm{\%}$ profit. What was the overall profit from the sale?