Add 15/45 and 7/40
15/45 + 7/40 is 61/120.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 45 × 8 = 360,
15/45 = 15 × 8/45 × 8 = 120/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
7/40 = 7 × 9/40 × 9 = 63/360 - Add the two like fractions:
120/360 + 63/360 = 120 + 63/360 = 183/360 - 183/360 simplified gives 61/120
- So, 15/45 + 7/40 = 61/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/45+7/40 15/45+14/40 15/90+7/40 15/45+7/80 15/45+21/40 75/45+7/40 15/45+35/40 15/45+49/40