Solutions by everydaycalculation.com

57 + 28 is 2728.

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

LCM of 7 and 8 is**56** - For the 1st fraction, since 7 × 8 = 56,

57 = 5 × 87 × 8 = 4056 - Likewise, for the 2nd fraction, since 8 × 7 = 56,

28 = 2 × 78 × 7 = 1456 - Add the two fractions:

4056 + 1456 = 40 + 1456 = 5456 - After reducing the fraction, the answer is 2728

Related: ^{10}/_{7}+^{2}/_{8} ^{5}/_{7}+^{4}/_{8} ^{5}/_{14}+^{2}/_{8} ^{5}/_{7}+^{2}/_{16} ^{15}/_{7}+^{2}/_{8} ^{5}/_{7}+^{6}/_{8} ^{5}/_{21}+^{2}/_{8} ^{5}/_{7}+^{2}/_{24} ^{25}/_{7}+^{2}/_{8} ^{5}/_{7}+^{10}/_{8} ^{5}/_{35}+^{2}/_{8} ^{5}/_{7}+^{2}/_{40} ^{35}/_{7}+^{2}/_{8} ^{5}/_{7}+^{14}/_{8} ^{5}/_{49}+^{2}/_{8} ^{5}/_{7}+^{2}/_{56}

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