22.5 minutes are spent preparing the ingredients.
Step-by-step explanation:
Given
total recipe time = t = 90 min
Percentage of time spent on ingredients = 25%
So,
[tex]Time\ for\ ingredients = 25\%\ of\ t\\=0.25*90\\=22.5[/tex]
Hence,
22.5 minutes are spent preparing the ingredients.
Keywords: Percentage, percent
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