Add 21/30 and 54/70
21/30 + 54/70 is 103/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
21/30 = 21 × 7/30 × 7 = 147/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
54/70 = 54 × 3/70 × 3 = 162/210 - Add the two like fractions:
147/210 + 162/210 = 147 + 162/210 = 309/210 - 309/210 simplified gives 103/70
- So, 21/30 + 54/70 = 103/70
In mixed form: 133/70
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