Add 21/70 and 7/45
21/70 + 7/45 is 41/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 45 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 70 × 9 = 630,
21/70 = 21 × 9/70 × 9 = 189/630 - Likewise, for the 2nd fraction, since 45 × 14 = 630,
7/45 = 7 × 14/45 × 14 = 98/630 - Add the two like fractions:
189/630 + 98/630 = 189 + 98/630 = 287/630 - 287/630 simplified gives 41/90
- So, 21/70 + 7/45 = 41/90
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