Add 21/25 and 15/90
21/25 + 15/90 is 151/150.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 90 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 25 × 18 = 450,
21/25 = 21 × 18/25 × 18 = 378/450 - Likewise, for the 2nd fraction, since 90 × 5 = 450,
15/90 = 15 × 5/90 × 5 = 75/450 - Add the two like fractions:
378/450 + 75/450 = 378 + 75/450 = 453/450 - 453/450 simplified gives 151/150
- So, 21/25 + 15/90 = 151/150
In mixed form: 11/150
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