HOW DO WE FIND THE PRODUCT OF A FRACTION

One of the same side angles of two parallel lines is 20° smaller than the other one. find the measures of these two angles.

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Afactory buys 10% of its components from suppliers b and the rest from supplier c. it is known that 6% of the components it buys are faulty. of the components brought from suppliers a,9% are faulty and of the components bought from suppliers b, 3% are faulty. find the percentage of components bought from supplier c that are faulty.