Add 30/84 and 21/45
30/84 + 21/45 is 173/210.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 45 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 84 × 15 = 1260,
30/84 = 30 × 15/84 × 15 = 450/1260 - Likewise, for the 2nd fraction, since 45 × 28 = 1260,
21/45 = 21 × 28/45 × 28 = 588/1260 - Add the two like fractions:
450/1260 + 588/1260 = 450 + 588/1260 = 1038/1260 - 1038/1260 simplified gives 173/210
- So, 30/84 + 21/45 = 173/210
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