Add 45/50 and 21/90
45/50 + 21/90 is 17/15.
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,
45/50 = 45 × 9/50 × 9 = 405/450 - Likewise, for the 2nd fraction, since 90 × 5 = 450,
21/90 = 21 × 5/90 × 5 = 105/450 - Add the two like fractions:
405/450 + 105/450 = 405 + 105/450 = 510/450 - 510/450 simplified gives 17/15
- So, 45/50 + 21/90 = 17/15
In mixed form: 12/15
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