Solutions by everydaycalculation.com

312 - 69 is -512.

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

LCM of 12 and 9 is**36** - For the 1st fraction, since 12 × 3 = 36,

312 = 3 × 312 × 3 = 936 - Likewise, for the 2nd fraction, since 9 × 4 = 36,

69 = 6 × 49 × 4 = 2436 - Subtract the two fractions:

936 - 2436 = 9 - 2436 = -1536 - After reducing the fraction, the answer is -512

Related: ^{6}/_{12}-^{6}/_{9} ^{3}/_{12}-^{12}/_{9} ^{3}/_{24}-^{6}/_{9} ^{3}/_{12}-^{6}/_{18} ^{9}/_{12}-^{6}/_{9} ^{3}/_{12}-^{18}/_{9} ^{3}/_{36}-^{6}/_{9} ^{3}/_{12}-^{6}/_{27} ^{15}/_{12}-^{6}/_{9} ^{3}/_{12}-^{30}/_{9} ^{3}/_{60}-^{6}/_{9} ^{3}/_{12}-^{6}/_{45} ^{21}/_{12}-^{6}/_{9} ^{3}/_{12}-^{42}/_{9} ^{3}/_{84}-^{6}/_{9} ^{3}/_{12}-^{6}/_{63}

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