Solutions by everydaycalculation.com
1st number: 4 0/4, 2nd number: 2 0/4
164 - 84 is 21.
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Related: 32/4-8/4 16/4-16/4 16/8-8/4 48/4-8/4 16/4-24/4 16/12-8/4 16/4-8/12 80/4-8/4 16/4-40/4 16/20-8/4 16/4-8/20 16/4-56/4 16/28-8/4 16/4-8/28
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