Question 266892
Nick had 1/2 lb of walnuts. 
He ate 3/10 lb of walnuts. 
What part of a pound of walnuts did he have left?
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Start: 1/2 lb
Ate: (3/10)(1/2) = 3/20
Amount left: (1/2) - (3/20)
= (10/20) - (3/20)
= 7/20 lb
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Cheers,
Stan H.