Solutions by everydaycalculation.com

1^{st} number: 1 1/3, 2^{nd} number: 1 3/5

43 - 85 is -415.

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

LCM of 3 and 5 is**15**

Next, find the equivalent fraction of both fractional numbers with denominator 15 - For the 1st fraction, since 3 × 5 = 15,

43 = 4 × 53 × 5 = 2015 - Likewise, for the 2nd fraction, since 5 × 3 = 15,

85 = 8 × 35 × 3 = 2415 - Subtract the two like fractions:

2015 - 2415 = 20 - 2415 = -415

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