Is it correct to increase or rise by an amount or by a percentage.<br/><br/>Last year I charged $1300 an hour. This year I charge $1500<br/>I've increased my rates by $200.<br/>I've risen my rates by $200.<br/><br/>Last year I charged $1000 an hour. This year I charge $3000.<br/>I've increased my rates by 200%.<br/>I've risen my rates by 200%.