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?
Mrs. Amaro has 80 x 3/4 = 
<gadget id="calculator">80*3/4</gadget>
<output>60</output>
60 red roses.
So, 80 - 60 = 
<gadget id="calculator">80-60</gadget>
<output>20</output>
20 roses are not red.
Then, 20 x 1/4 = 5 of those 20 non-red roses are yellow.
Hence, 20 - 5 = 
<gadget id="calculator">20-5</gadget>
<output>15</output>
15 roses are white.
Therefore, 60 + 15 = 
<gadget id="calculator">60+15</gadget>
<output>75</output>
75 roses are either red or white.

<result>75</result>