Solutions by everydaycalculation.com

13 - 440 is 730.

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

LCM of 3 and 40 is**120** - For the 1st fraction, since 3 × 40 = 120,

13 = 1 × 403 × 40 = 40120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,

440 = 4 × 340 × 3 = 12120 - Subtract the two fractions:

40120 - 12120 = 40 - 12120 = 28120 - After reducing the fraction, the answer is 730

Related: ^{2}/_{3}-^{4}/_{40} ^{1}/_{3}-^{8}/_{40} ^{1}/_{6}-^{4}/_{40} ^{1}/_{3}-^{4}/_{80} ^{1}/_{3}-^{12}/_{40} ^{1}/_{9}-^{4}/_{40} ^{5}/_{3}-^{4}/_{40} ^{1}/_{3}-^{20}/_{40} ^{1}/_{15}-^{4}/_{40} ^{7}/_{3}-^{4}/_{40} ^{1}/_{3}-^{28}/_{40} ^{1}/_{21}-^{4}/_{40}

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