Solutions by everydaycalculation.com

980 + 790 is 137720.

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

LCM of 80 and 90 is**720**

Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,

980 = 9 × 980 × 9 = 81720 - Likewise, for the 2nd fraction, since 90 × 8 = 720,

790 = 7 × 890 × 8 = 56720 - Add the two like fractions:

81720 + 56720 = 81 + 56720 = 137720 - So, 9/80 + 7/90 = 137/720

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