Answer is 40
Step by step
a number (we will call it n)
2/5 of the number (2/5n)
Is (=)
6 more than 10 (10 + 6)
Put this into equation form and solve
2/5n = 10 + 6
2/5n = 16
divide both sides by 2/5 to solve for n
When we divide a fraction we flip the divisor and multiply
2/5 * 5/2 n = 16 * 5/2
Multiply across
N = 80/2
N = 40
Check your work, substitute 40 for n
2/5 n = 16(2/5) (40) = 16
80/5 = 16
16 = 16
problem solved