Add 90/20 and 70/45
1st number: 4 10/20, 2nd number: 1 25/45
90/20 + 70/45 is 109/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
90/20 = 90 × 9/20 × 9 = 810/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
70/45 = 70 × 4/45 × 4 = 280/180 - Add the two like fractions:
810/180 + 280/180 = 810 + 280/180 = 1090/180 - 1090/180 simplified gives 109/18
- So, 90/20 + 70/45 = 109/18
In mixed form: 61/18
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