Add 21/90 and 54/72
21/90 + 54/72 is 59/60.
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,
54/72 = 54 × 5/72 × 5 = 270/360 - Add the two like fractions:
84/360 + 270/360 = 84 + 270/360 = 354/360 - 354/360 simplified gives 59/60
- So, 21/90 + 54/72 = 59/60
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