Given the original amount and the percent of change, find the new amount. 160 bananas; 20% decrease

Can someone answer these problems for me

Olga used 100 ounces of flour to make 225 muffins. how many ounces of flour will be used to make 300 muffins?

40 points. given: two congruent angles ∠c and ∠r are supplementary. prove: ∠r and ∠c are both right angles. it doesn't have to be exactly 10 rows. statements reasons1. 1. 2. 2. 3. 3. 4. 4. 5. 5. 6. 6. 7. 7. 8. 8. 9. 9. 10. 10.