Rachel answered 20 out of 25 questions correctly on her science test . what percent of the questions did she answer correctly

Aswimming pool has an input pump for filling the pool and an output pump for emptying the pool. the input pump can fill the pool in 3 hours, and the output pump can drain the pool in 5 hours. as you go to bed, the pool is full, but a neighbor’s kid turns on the output pump. at midnight, you awake to find the pool half empty. immediately, you turn on the input pump, but you are sleepy and forget to turn off the output pump. at what time will the pool become full?

Percent increase and decrease. original number: 45 new number: 18

During a wright loss challenge your friend goes from 125 pounds to 100 pounds. what was the percent weight loss