Add 72/84 and 9/30
72/84 + 9/30 is 81/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 30 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
72/84 = 72 × 5/84 × 5 = 360/420 - Likewise, for the 2nd fraction, since 30 × 14 = 420,
9/30 = 9 × 14/30 × 14 = 126/420 - Add the two like fractions:
360/420 + 126/420 = 360 + 126/420 = 486/420 - 486/420 simplified gives 81/70
- So, 72/84 + 9/30 = 81/70
In mixed form: 111/70
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