Add 21/24 and 18/90
21/24 + 18/90 is 43/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 90 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 24 × 15 = 360,
21/24 = 21 × 15/24 × 15 = 315/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
18/90 = 18 × 4/90 × 4 = 72/360 - Add the two like fractions:
315/360 + 72/360 = 315 + 72/360 = 387/360 - 387/360 simplified gives 43/40
- So, 21/24 + 18/90 = 43/40
In mixed form: 13/40
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