Add 18/72 and 70/80
18/72 + 70/80 is 9/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 72 × 10 = 720,
18/72 = 18 × 10/72 × 10 = 180/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
70/80 = 70 × 9/80 × 9 = 630/720 - Add the two like fractions:
180/720 + 630/720 = 180 + 630/720 = 810/720 - 810/720 simplified gives 9/8
- So, 18/72 + 70/80 = 9/8
In mixed form: 11/8
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