Add 70/90 and 15/20
70/90 + 15/20 is 55/36.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 90 × 2 = 180,
70/90 = 70 × 2/90 × 2 = 140/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
15/20 = 15 × 9/20 × 9 = 135/180 - Add the two like fractions:
140/180 + 135/180 = 140 + 135/180 = 275/180 - 275/180 simplified gives 55/36
- So, 70/90 + 15/20 = 55/36
In mixed form: 119/36
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