I often send small amount of Bitcoin around 100,000 satoshi, is there a way to avoid paying a fee that is a significant proportion of the amount sent?
You can choose to avoid paying fee completely if it was 2013 and we had n number of miners.Times have changed,block rewards are low,solo miners can't really afford doing stuff for free while paying a good amount for electricity charges.If you just google a bitcoin transaction calculator ,you will be presented with a lot of options.Although I advice you to pay a little more then the calculated fee if you don't have the patience to watch your transaction getting accepted by the node on low priority basis.