Add 18/20 and 70/90
18/20 + 70/90 is 151/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
18/20 = 18 × 9/20 × 9 = 162/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
70/90 = 70 × 2/90 × 2 = 140/180 - Add the two like fractions:
162/180 + 140/180 = 162 + 140/180 = 302/180 - 302/180 simplified gives 151/90
- So, 18/20 + 70/90 = 151/90
In mixed form: 161/90
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