Add 45/18 and 90/20
1st number: 2 9/18, 2nd number: 4 10/20
45/18 + 90/20 is 7/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 18 × 10 = 180,
45/18 = 45 × 10/18 × 10 = 450/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
90/20 = 90 × 9/20 × 9 = 810/180 - Add the two like fractions:
450/180 + 810/180 = 450 + 810/180 = 1260/180 - 1260/180 simplified gives 7/1
- So, 45/18 + 90/20 = 7/1
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