Add 42/50 and 21/90
42/50 + 21/90 is 161/150.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 90 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 50 × 9 = 450,
42/50 = 42 × 9/50 × 9 = 378/450 - Likewise, for the 2nd fraction, since 90 × 5 = 450,
21/90 = 21 × 5/90 × 5 = 105/450 - Add the two like fractions:
378/450 + 105/450 = 378 + 105/450 = 483/450 - 483/450 simplified gives 161/150
- So, 42/50 + 21/90 = 161/150
In mixed form: 111/150
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