Probably depends a little on what kind of fruit, but raisins are about 75% sugar by weight. So if all of the sugars were extracted and fermented (unlikely), your 1.5 lbs of fruit would be about 1.1 lbs of sugar.
In a 5g batch, that's worth about 10 gravity points, or an additional 1.3% ABV, max. You'll probably get less than half that.
So your "adjusted" OG would be something around 1.096, and your ABV at 1.021 is ~9.8%
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