Add 21/90 and 4/72
21/90 + 4/72 is 13/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 90 × 4 = 360,
21/90 = 21 × 4/90 × 4 = 84/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
4/72 = 4 × 5/72 × 5 = 20/360 - Add the two like fractions:
84/360 + 20/360 = 84 + 20/360 = 104/360 - 104/360 simplified gives 13/45
- So, 21/90 + 4/72 = 13/45
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