Add 21/90 and 42/98
21/90 + 42/98 is 139/210.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 98 is 4410
Next, find the equivalent fraction of both fractional numbers with denominator 4410 - For the 1st fraction, since 90 × 49 = 4410,
21/90 = 21 × 49/90 × 49 = 1029/4410 - Likewise, for the 2nd fraction, since 98 × 45 = 4410,
42/98 = 42 × 45/98 × 45 = 1890/4410 - Add the two like fractions:
1029/4410 + 1890/4410 = 1029 + 1890/4410 = 2919/4410 - 2919/4410 simplified gives 139/210
- So, 21/90 + 42/98 = 139/210
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