How to Thumbnails ( Featured image ) left to Post ?

Hello Everyone,

I need to fix this but i cant so m sharing with u if u made this for me,

whenever i post anything with featured image it shows https://apnalachi.com/wp-content/uploads/2015/08/crnt.jpg

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but i need this thumbnail to b in left and my post text will b in-front of thumbnail like this https://apnalachi.com/wp-content/uploads/2015/08/ww.jpg
or this https://apnalachi.com/wp-content/uploads/2015/08/trgt.jpg

i m using wordpress Version 4.2.2
And my theme is UMAG

Any help will be appreciated thanks