16. a), Mrs. Dhital makes a profit of 50% of the cost of her investment in the transaction of her cosmetic items. She further increases her cost of investment by 25% but the selling price remains the same. How much is the decrease in her profit percent?

1. 2. ∠b and ∠y are right angles. 3.? 4.? which two statements are missing in steps 3 and 4? ∠x ≅ ∠c △abc ~ △zyx by the sas similarity theorem. ∠b ≅ ∠y △abc ~ △zyx by the sas similarity theorem. = 2 △abc ~ △zyx by the sss similarity theorem. = 2 △abc ~ △zyx by the sss similarity theorem.