Add 21/45 and 54/72
21/45 + 54/72 is 73/60.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 45 × 8 = 360,
21/45 = 21 × 8/45 × 8 = 168/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
54/72 = 54 × 5/72 × 5 = 270/360 - Add the two like fractions:
168/360 + 270/360 = 168 + 270/360 = 438/360 - 438/360 simplified gives 73/60
- So, 21/45 + 54/72 = 73/60
In mixed form: 113/60
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