Cal has a sports trading card collection with 30 baseball cards, 25 basketball cards, and 45 football cards. what percent of his cards are basketball cards?

total cards = 30 + 25 + 45 = 100

25 are basket ball

25/100 = 0.25

0.25 = 25%

 25% are basketball

for any of you who need the translation here it is

step-by-step explanation:

find the angular size of the equatorial radius of the earth, if the horizontal parallax of the sun