Add 72/80 and 4/9
72/80 + 4/9 is 121/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 9 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
72/80 = 72 × 9/80 × 9 = 648/720 - Likewise, for the 2nd fraction, since 9 × 80 = 720,
4/9 = 4 × 80/9 × 80 = 320/720 - Add the two like fractions:
648/720 + 320/720 = 648 + 320/720 = 968/720 - 968/720 simplified gives 121/90
- So, 72/80 + 4/9 = 121/90
In mixed form: 131/90
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