Add 90/70 and 80/60
1st number: 1 20/70, 2nd number: 1 20/60
90/70 + 80/60 is 55/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 60 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 70 × 6 = 420,
90/70 = 90 × 6/70 × 6 = 540/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
80/60 = 80 × 7/60 × 7 = 560/420 - Add the two like fractions:
540/420 + 560/420 = 540 + 560/420 = 1100/420 - 1100/420 simplified gives 55/21
- So, 90/70 + 80/60 = 55/21
In mixed form: 213/21
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