Question

A recipe takes 90 minutes to make 35% of the time is spent preparing the ingredients how many minutes are spent preparing

Answer 1

You need to convert the percent to a decimal then multiply.
35% as a decimal is 0.35
90x0.35=31.5
The answer should be 31.5 (I'm not good at these types of problems)

Answer 2

90 times .35 is 31 mins 30 seconds