Add 25/42 and 81/90
25/42 + 81/90 is 157/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 42 × 15 = 630,
25/42 = 25 × 15/42 × 15 = 375/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
81/90 = 81 × 7/90 × 7 = 567/630 - Add the two like fractions:
375/630 + 567/630 = 375 + 567/630 = 942/630 - 942/630 simplified gives 157/105
- So, 25/42 + 81/90 = 157/105
In mixed form: 152/105
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