NOTE: Please use as the solution the solution on bold, not on the italic one. It's more complicated.
This is done by dividing 4 1/5 by 1 3/4.
We can convert this things on decimal to be more easy, seriously.
4 1/5 ÷ 1 3/4 = x
4.2 ÷ 1.75 = x
2.4 = x
2 2/5 = x
So therefore, he can finish one mat in 2 days, and 4 hours.
We shouldn't convert for it to be more easy-to-understand. Instead, use the divisor's reciprocal.
4 1/5 ÷ 1 3/4 = x
21/5 ÷ 7/4 = x
21/5 × 4/7 = x
84/35 = x
2.4 = x
2 2/5 = x
So therefore, he can finish one math in 2 days, and 4 hours.
