After 2 months on a dier, John's weight droped from 168 pounds to 147 pounds. By what percent did John's weight drop?

the weights of 5 boxes of srews vary from 2.85 pounds to 3.45 pounds. If w represents the weight, in pounds, of one of these boxes, which of the following must be true?

Jessica has two cats named Mittens and Fluffy. Last year Mittens weighed 12 pounds, and Fluffy weighed 19 pounds. Fluffy was placed on a diet, and his weight decreased by 20% Mittens weight has increased by 20% . By what percentage did Mitten's and Fluffy's combined weight decrease, to the nearest tenth of a percent?

The weights of two persons A and B are in the ratio of 3:5. Al's weight increases by 20% and the total weight of A and B together becomes 80 kg,with an increase of 25%. By what percent did the weight of B increase? 20% b.25% c.28% d.30%

During course registration, 28 students enroll in a certain college class. After three boys are dropped from the class, 44% of the class consists of boys. What percent of the original class did girls comprise?