Add 20/56 and 70/90
20/56 + 70/90 is 143/126.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 90 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 56 × 45 = 2520,
20/56 = 20 × 45/56 × 45 = 900/2520 - Likewise, for the 2nd fraction, since 90 × 28 = 2520,
70/90 = 70 × 28/90 × 28 = 1960/2520 - Add the two like fractions:
900/2520 + 1960/2520 = 900 + 1960/2520 = 2860/2520 - 2860/2520 simplified gives 143/126
- So, 20/56 + 70/90 = 143/126
In mixed form: 117/126
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