Solutions by everydaycalculation.com

45 - 28 is 1120.

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

LCM of 5 and 8 is**40**

Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 5 × 8 = 40,

45 = 4 × 85 × 8 = 3240 - Likewise, for the 2nd fraction, since 8 × 5 = 40,

28 = 2 × 58 × 5 = 1040 - Subtract the two like fractions:

3240 - 1040 = 32 - 1040 = 2240 - After reducing the fraction, the answer is 1120

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