Solutions by everydaycalculation.com

1^{st} number: 36/45, 2^{nd} number: 1 15/20

3645 - 3520 is -1920.

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

LCM of 45 and 20 is**180**

Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,

3645 = 36 × 445 × 4 = 144180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,

3520 = 35 × 920 × 9 = 315180 - Subtract the two like fractions:

144180 - 315180 = 144 - 315180 = -171180 - After reducing the fraction, the answer is -1920

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