Add 20/25 and 42/90
20/25 + 42/90 is 19/15.
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,
20/25 = 20 × 18/25 × 18 = 360/450 - Likewise, for the 2nd fraction, since 90 × 5 = 450,
42/90 = 42 × 5/90 × 5 = 210/450 - Add the two like fractions:
360/450 + 210/450 = 360 + 210/450 = 570/450 - 570/450 simplified gives 19/15
- So, 20/25 + 42/90 = 19/15
In mixed form: 14/15
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