Red flower color is dominant to white flower color in red roses. what is the expected result of a cross between two heterozygous rose plants

The red flower is dominant "R" to white flower color "r" in red roses. We are asked of what is the expected result of a cross between the two heterozygous rose plants and the answer is "75 % for the red, 25% for the white flower."

Heterozygous parents would have the genotype Rr. In a punnett square, this would show a result of 25% homozygous dominant (RR) offspring, 25% homozygous recessive (rr) offspring, and 50% heterozygous (Rr) offspring.

(I attempted to simulate a punnett square with the text)

R r

R| RR | Rr

r | Rr | rr