Add 70/80 and 70/90
70/80 + 70/90 is 119/72.
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,
70/90 = 70 × 8/90 × 8 = 560/720 - Add the two like fractions:
630/720 + 560/720 = 630 + 560/720 = 1190/720 - 1190/720 simplified gives 119/72
- So, 70/80 + 70/90 = 119/72
In mixed form: 147/72
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