Solutions by everydaycalculation.com

15 - 56 is -1930.

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

LCM of 5 and 6 is**30** - For the 1st fraction, since 5 × 6 = 30,

15 = 1 × 65 × 6 = 630 - Likewise, for the 2nd fraction, since 6 × 5 = 30,

56 = 5 × 56 × 5 = 2530 - Subtract the two fractions:

630 - 2530 = 6 - 2530 = -1930

Related: ^{2}/_{5}-^{5}/_{6} ^{1}/_{5}-^{10}/_{6} ^{1}/_{10}-^{5}/_{6} ^{1}/_{5}-^{5}/_{12} ^{3}/_{5}-^{5}/_{6} ^{1}/_{5}-^{15}/_{6} ^{1}/_{15}-^{5}/_{6} ^{1}/_{5}-^{5}/_{18} ^{1}/_{5}-^{25}/_{6} ^{1}/_{25}-^{5}/_{6} ^{1}/_{5}-^{5}/_{30} ^{7}/_{5}-^{5}/_{6} ^{1}/_{5}-^{35}/_{6} ^{1}/_{35}-^{5}/_{6} ^{1}/_{5}-^{5}/_{42}

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