Solutions by everydaycalculation.com

2021 - 28 is 5984.

- Find the least common denominator or LCM of the two denominators:

LCM of 21 and 8 is**168** - For the 1st fraction, since 21 × 8 = 168,

2021 = 20 × 821 × 8 = 160168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,

28 = 2 × 218 × 21 = 42168 - Subtract the two fractions:

160168 - 42168 = 160 - 42168 = 118168 - After reducing the fraction, the answer is 5984

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