Solutions by everydaycalculation.com

1^{st} number: 81/90, 2^{nd} number: 5 5/9

8190 - 509 is -41990.

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

LCM of 90 and 9 is**90**

Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,

8190 = 81 × 190 × 1 = 8190 - Likewise, for the 2nd fraction, since 9 × 10 = 90,

509 = 50 × 109 × 10 = 50090 - Subtract the two like fractions:

8190 - 50090 = 81 - 50090 = -41990

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