Add 28/90 and 21/63
28/90 + 21/63 is 29/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 63 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
28/90 = 28 × 7/90 × 7 = 196/630 - Likewise, for the 2nd fraction, since 63 × 10 = 630,
21/63 = 21 × 10/63 × 10 = 210/630 - Add the two like fractions:
196/630 + 210/630 = 196 + 210/630 = 406/630 - 406/630 simplified gives 29/45
- So, 28/90 + 21/63 = 29/45
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