Solutions by everydaycalculation.com

1^{st} number: 7/8, 2^{nd} number: 1 1/9

78 - 109 is -1772.

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

LCM of 8 and 9 is**72**

Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 8 × 9 = 72,

78 = 7 × 98 × 9 = 6372 - Likewise, for the 2nd fraction, since 9 × 8 = 72,

109 = 10 × 89 × 8 = 8072 - Subtract the two like fractions:

6372 - 8072 = 63 - 8072 = -1772

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