conversations.from: human
conversations.value: This math problem has got me stumped: Mrs. Amaro has 80 roses in her garden. Three-fourths of her roses are red, one-fourth of the remaining are yellow, and the rest are white. How many of Mrs. Amaro's roses are either red or white?
  Can you show me the way?
conversations.from: assistant
conversations.value: Mrs. Amaro has 80 x 3/4 = 60 red roses.
  So, 80 - 60 = 20 roses are not red.
  Then, 20 x 1/4 = 5 of those 20 non-red roses are yellow.
  Hence, 20 - 5 = 15 roses are white.
  Therefore, 60 + 15 = 75 roses are either red or white.