Add 9/30 and 7/40
9/30 + 7/40 is 19/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 30 × 4 = 120,
9/30 = 9 × 4/30 × 4 = 36/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
7/40 = 7 × 3/40 × 3 = 21/120 - Add the two like fractions:
36/120 + 21/120 = 36 + 21/120 = 57/120 - 57/120 simplified gives 19/40
- So, 9/30 + 7/40 = 19/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/30+7/40 9/30+14/40 9/60+7/40 9/30+7/80 27/30+7/40 9/30+21/40 9/90+7/40 45/30+7/40 9/30+35/40 63/30+7/40 9/30+49/40