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For the positive quantities h, j, and k, 15% of h is equivalent to 20% of j, and j is equivalent to 60% of k. What percentage of k is h? (Disregard the % sign when entering your answer. For example, if your answer is 39%, enter 39)

A researcher surveyed undergraduate students, graduate students, and postdoctoral students. The number of undergraduate students surveyed was 6,950% of the number of postdoctoral students surveyed and the number of graduate students surveyed was 32% of the number of undergraduate students surveyed. If there were 4,448 graduate students surveyed, what was the sum of the number of undergraduate students and postdoctoral students surveyed?

A jar has 330 buttons, and 20% of these buttons are green. How many buttons in the jar are green?

Stefan purchased 500 feet of fencing. He used 80% of this fencing to surround a vegetable garden. How many feet of fencing did Stefan use to surround the vegetable garden?

For the positive quantities h,  j, and k, 42% of h is equivalent to 84% of  j, and  j is equivalent to 64% of k. What percentage of k is h? (Disregard the % sign when entering your answer. For example, if your answer is 39%, enter 39 )

The positive number a is 290% of the number b and a is 90% of the number c. If c is p% of b , which of the following is closest to the value of p?

Object Z has a mass of 170 grams. The mass of object X is 4,400% of the mass of object Z. The mass of object Z is 20% of the mass of object Y. The sum, in grams, of the mass of object X and the mass of object Y is equal to the product, in grams, of w and the mass of object Z, where w is a constant. What is the value of w? 

There are a total of 340 seats in a school auditorium. During an assembly, students occupied 50% of the seats in the auditorium. How many seats did the students occupy during this assembly?

The mass of object A is 444% of the mass of object B, and the mass of object A is 0.740% of the mass of object C. If the mass of object C is p% of the mass of object B, what is the value of p?

A certain university's research farm is 1,000 acres, of which 71 acres contain rice. What percentage of the acres of this research farm contain rice?

A real estate company offers a series of three webinars. 3,125 people attended the first webinar. 56% of the people who attended the first webinar attended the second webinar, and 26% of the people who attended the first and second webinars attended the third webinar. How many people attended all three webinars?

Which expression represents 1% of \( 31x \) ,where \( x>0 \) ?