Solutions by everydaycalculation.com

4580 + 190 is 413720.

- 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,

4580 = 45 × 980 × 9 = 405720 - Likewise, for the 2nd fraction, since 90 × 8 = 720,

190 = 1 × 890 × 8 = 8720 - Add the two like fractions:

405720 + 8720 = 405 + 8720 = 413720 - So, 45/80 + 1/90 = 413/720

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