Help please

An animal shelter has 21 puppies. if the puppies are 28% of the total dogs and cat population how many dogs and cats are in the animal shelter

Find three consecutive numbers such that the sum of one-fourth the first and one-fifth the second is five less than one-seventh the third

From the beginning of the day the temperature rose 15 degrees so that by 4 pm it was 87 degrees. what was the temperature at the start of the day