The length of a rectangle is increased by 50%. By what percent should the breadth be decreased to get the same area?

The length of a rectangle is increased by 30%. By what percent would the breadth have to be decreased to maintain the same area?

The length of a rectangle is increased by 60%. By what percent would the width have to be reduced to maintain the same area ?

If the length of a rectangle is increased by 50%, by how much per cent its breadth should be reduced to keep the area same ?