Add 9/40 and 12/90
9/40 + 12/90 is 43/120.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 90 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
9/40 = 9 × 9/40 × 9 = 81/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
12/90 = 12 × 4/90 × 4 = 48/360 - Add the two like fractions:
81/360 + 48/360 = 81 + 48/360 = 129/360 - 129/360 simplified gives 43/120
- So, 9/40 + 12/90 = 43/120
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