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From straight up being 0⁰     the minut hand moves   6 degrees per minute    6 x 15 = 90 degrees

    the hour hand moves 1/2 degree per minute  and 30 degrees per hour    .5 x 15 = 7.5 degree  + 30 x 2 = 67.5^o

90- 67.5 = 22.5^o

I feel like this is is an easy problem.