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oocicoo
the answer is 7/10.              
NatSuki2006
The answer is 7/10:
1/5 and 9/10 HAVE to have the same denominator for us to do this problem.
So: 5 and 10 have a multiplier in common: 2
So: 1/5 x 2/2 = 2/10
Then you subtract: 9/10 - 2/10 which equals to:
7/10!!!
Your welcome!!!
good job