Add 16/40 and 45/21
1st number: 16/40, 2nd number: 2 3/21
16/40 + 45/21 is 89/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 21 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 40 × 21 = 840,
16/40 = 16 × 21/40 × 21 = 336/840 - Likewise, for the 2nd fraction, since 21 × 40 = 840,
45/21 = 45 × 40/21 × 40 = 1800/840 - Add the two like fractions:
336/840 + 1800/840 = 336 + 1800/840 = 2136/840 - 2136/840 simplified gives 89/35
- So, 16/40 + 45/21 = 89/35
In mixed form: 219/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/40+45/21 16/40+90/21 16/80+45/21 16/40+45/42 48/40+45/21 16/40+45/63 80/40+45/21