Add 70/80 and 84/90
70/80 + 84/90 is 217/120.
Steps for adding fractions
- 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,
70/80 = 70 × 9/80 × 9 = 630/720 - Likewise, for the 2nd fraction, since 90 × 8 = 720,
84/90 = 84 × 8/90 × 8 = 672/720 - Add the two like fractions:
630/720 + 672/720 = 630 + 672/720 = 1302/720 - 1302/720 simplified gives 217/120
- So, 70/80 + 84/90 = 217/120
In mixed form: 197/120
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