Add 45/70 and 9/20
45/70 + 9/20 is 153/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 70 × 2 = 140,
45/70 = 45 × 2/70 × 2 = 90/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
9/20 = 9 × 7/20 × 7 = 63/140 - Add the two like fractions:
90/140 + 63/140 = 90 + 63/140 = 153/140 - So, 45/70 + 9/20 = 153/140
In mixed form: 113/140
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