Solutions by everydaycalculation.com

57 + 89 is 10163.

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

LCM of 7 and 9 is**63**

Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 7 × 9 = 63,

57 = 5 × 97 × 9 = 4563 - Likewise, for the 2nd fraction, since 9 × 7 = 63,

89 = 8 × 79 × 7 = 5663 - Add the two like fractions:

4563 + 5663 = 45 + 5663 = 10163 - So, 5/7 + 8/9 = 101/63

In mixed form: 13863

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:

Android and iPhone/ iPad

Related: ^{10}/_{7}+^{8}/_{9} ^{5}/_{7}+^{16}/_{9} ^{5}/_{14}+^{8}/_{9} ^{5}/_{7}+^{8}/_{18} ^{15}/_{7}+^{8}/_{9} ^{5}/_{7}+^{24}/_{9} ^{5}/_{21}+^{8}/_{9} ^{5}/_{7}+^{8}/_{27} ^{25}/_{7}+^{8}/_{9} ^{5}/_{7}+^{40}/_{9} ^{5}/_{35}+^{8}/_{9} ^{5}/_{7}+^{8}/_{45} ^{35}/_{7}+^{8}/_{9} ^{5}/_{7}+^{56}/_{9} ^{5}/_{49}+^{8}/_{9} ^{5}/_{7}+^{8}/_{63}

© everydaycalculation.com