Add 30/80 and 90/81
1st number: 30/80, 2nd number: 1 9/81
30/80 + 90/81 is 107/72.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 81 is 6480
Next, find the equivalent fraction of both fractional numbers with denominator 6480 - For the 1st fraction, since 80 × 81 = 6480,
30/80 = 30 × 81/80 × 81 = 2430/6480 - Likewise, for the 2nd fraction, since 81 × 80 = 6480,
90/81 = 90 × 80/81 × 80 = 7200/6480 - Add the two like fractions:
2430/6480 + 7200/6480 = 2430 + 7200/6480 = 9630/6480 - 9630/6480 simplified gives 107/72
- So, 30/80 + 90/81 = 107/72
In mixed form: 135/72
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