Add 40/72 and 30/90
40/72 + 30/90 is 8/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 90 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
40/72 = 40 × 5/72 × 5 = 200/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
30/90 = 30 × 4/90 × 4 = 120/360 - Add the two like fractions:
200/360 + 120/360 = 200 + 120/360 = 320/360 - 320/360 simplified gives 8/9
- So, 40/72 + 30/90 = 8/9
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