Answer:
75%
Explanation:
Sorry it took so long for me to see this
100%/x%=28/21
(100/x)*x=(28/21)*x - we multiply both sides of the equation by x
100=1.333*x - we divide both sides of the equation by (1.333) to get x
100/1.333=x
75=x
x=75
21 is 75% of 28
Good luck have a Nice Day