(1)A shopkeeper makes a profit of $60 by selling a sweater for $ 665. find his profit percent
(2)Karim sells a shirt for $350 and makes a profit of $100.find his profit percent
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Let the number of students of arts be 5a and that of commerce be 6a
After 1 year,
Number of students of arts = 5a + 10 % of 5a
= 5a + 10 × 5a / 100
= 5a + a/2
= 11a / 2
Number of students of commerce = 6a + 20% of 6a
= 6a + 20 × 6a /100
= 6a + 6a/5
= 36a/5
Required ratio = ( 11a /2) /(36a/5)
= ( 11 / 2) ÷ (36 /5)
= ( 11 /2) × (5/36)
= 55 / 72
= 55:72
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