Add 28/90 and 28/40
28/90 + 28/40 is 91/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 90 × 4 = 360,
28/90 = 28 × 4/90 × 4 = 112/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
28/40 = 28 × 9/40 × 9 = 252/360 - Add the two like fractions:
112/360 + 252/360 = 112 + 252/360 = 364/360 - 364/360 simplified gives 91/90
- So, 28/90 + 28/40 = 91/90
In mixed form: 11/90
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